Epinephrine

Norepinephrine

The adrenergic receptors (or adrenoceptors) are a class of G protein-coupled receptors that are targets of the catecholamines. Adrenergic receptors specifically bind their endogenous ligands, the catecholamines adrenaline and noradrenaline (called epinephrine and norepinephrine in the United States), and are activated by these. Image File history File links Adrenaline. ... Image File history File links Adrenaline. ... Adrenaline redirects here. ... Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... Norepinephrine (INN)(abbr. ... A Mu-opioid G protein-coupled receptor with its agonist Figure 1. ... tyrosine is the precursor of catecholamines epinephrine norepinephrine dopamine Synthesis Catecholamines are chemical compounds derived from the amino acid tyrosine containing catechol and amine groups. ... In biochemistry, a receptor is a protein on the cell membrane or within the cytoplasm or cell nucleus that binds to a specific molecule (a ligand), such as a neurotransmitter, hormone, or other substance, and initiates the cellular response to the ligand. ... Look up Endogenous in Wiktionary, the free dictionary. ... In chemistry, a ligand is an atom, ion, or molecule (see also: functional group) that generally donates one or more of its electrons through a coordinate covalent bond to, or shares its electrons through a covalent bond with, one or more central atoms or ions (these ligands act as a... Epinephrine (INN) or adrenaline (BAN) is a hormone and a neurotransmitter. ... Norepinephrine, known as noradrenaline outside the USA, is a catecholamine and a phenethylamine with chemical formula C8H11NO3. ... Adrenaline redirects here. ... Norepinephrine (INN)(abbr. ...

Many cells possess these receptors, and the binding of an agonist will generally cause a sympathetic response (ie the fight-or-flight response). For instance, the heart rate will increase and the pupils will dilate, energy will be mobilized, and blood flow diverted from other organs to skeletal muscle.(Note: Sympathetic activity will result in vasodilation of coronary arteries via the beta-2 adrenergic receptors.) Agonists An agonist is a substance that binds to a receptor and triggers a response in the cell. ... The fight-or-flight response, also called hyperarousal or the acute stress response, was first described by Walter Cannon in 1915[1][2]. His theory states that animals react to threats with a general discharge of the sympathetic nervous system, priming the animal for fighting or fleeing. ... Heart rate is a term used to describe the frequency of the cardiac cycle. ... The human eye The pupil is the central transparent area (showing as black). ... A top-down view of skeletal muscle Skeletal muscle is a type of striated muscle, usually attached to the skeleton. ... The blood vessels are part of the circulatory system and function to transport blood throughout the body. ...

Subtypes

The mechanism of adrenergic receptors. Adrenaline or noradrenaline are receptor ligands to either α₁, α₂ or β-adrenergic receptors. α₁ couples to G_q, which results in incerased intracellular Ca²⁺ which results in e.g. smooth muscle contraction. α₂, on the other hand, couples to G_i, which causes a decrease of cAMP activity, resulting in e.g. smooth muscle contraction. β receptors couple to G_s, and increases intracellular cAMP activity, resulting in e.g. heart muscle contraction, smooth muscle relaxation and glycogenolysis.

There are several types of adrenergic receptors, but there are two main groups: α-Adrenergic and β-Adrenergic. Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... Myoglobin (blue) with its ligand heme (orange) bound. ... The alpha-1 adrenergic receptor (alpha-1-AR) is an adrenergic receptor with the primary effect of vasoconstriction. ... Epinephrine Norepinephrine The adrenergic receptors (or adrenoceptors) are a class of G protein-coupled receptors that are targets of the catecholamines. ... The alpha-1 adrenergic receptor (alpha-1-AR) is an adrenergic receptor with the primary effect of vasoconstriction. ... Gq protein is a heterotrimeric G protein subunit that activates phospholipase C (PLC). ... For other uses, see Calcium (disambiguation). ... Smooth muscle Layers of Esophageal Wall: 1. ... Epinephrine Norepinephrine The adrenergic receptors (or adrenoceptors) are a class of G protein-coupled receptors that are targets of the catecholamines. ... Gi alpha subunit is a heterotrimeric G protein subunit which inhibits the production of cAMP from ATP. 5-HT receptor type 1 uses this subunit. ... Structure of cAMP Cyclic adenosine monophosphate (cAMP, cyclic AMP or 3-5-cyclic adenosine monophosphate) is a molecule that is important in many biological processes; it is derived from adenosine triphosphate (ATP). ... G(s)alpha is a heterotrimeric G protein subunit which activates adenylate cyclase. ... Structure of cAMP Cyclic adenosine monophosphate (cAMP, cyclic AMP or 3-5-cyclic adenosine monophosphate) is a molecule that is important in many biological processes; it is derived from adenosine triphosphate (ATP). ... Myocardium is the muscular tissue of the heart. ... Glycogen Glucose Glucose-6-phosphate Glycogenolysis is the catabolism of glycogen by removal of a glucose monomer and addition of phosphate to produce glucose-1-phosphate. ...

• α receptors bind norepinephrine and epinephrine, though norepinephrine has higher affinity. Phenylephrine is a selective agonist of the α receptor. They exist as α₁-adrenergic receptors and α₂-adrenergic receptors.
• β receptors are linked to G_s proteins, which in turn are linked to adenylyl cyclase. Agonist binding thus causes a rise in the intracellular concentration of the second messenger cAMP. Downstream effectors of cAMP include cAMP-dependent protein kinase (PKA), which mediates some of the intracellular events following hormone binding.

Phenylephrine or Neo-Synephrine is an α-adrenergic receptor agonist used primarily as a decongestant, as an agent to dilate the pupil and to increase blood pressure. ... Agonists In pharmacology an agonist is a substance that binds to a specific receptor and triggers a response in the cell. ... The alpha-1 adrenergic receptor (alpha-1-AR) is an adrenergic receptor with the primary effect of vasoconstriction. ... Epinephrine Norepinephrine The adrenergic receptors (or adrenoceptors) are a class of G protein-coupled receptors that are targets of the catecholamines. ... G-proteins, short for guanine nucleotide binding proteins, are a family of proteins involved in second messenger cascades. ... Adenylate cyclase (EC 4. ... Structure of cAMP Cyclic adenosine monophosphate (cAMP, cyclic AMP or 3-5-cyclic adenosine monophosphate) is a molecule that is important in many biological processes; it is derived from adenosine triphosphate (ATP). ... In cell biology, cAMP-dependent protein kinase (cAPK), also known as protein kinase A (PKA, EC 2. ...

Comparison

The absence of "ADRA1C" is intentional. At one time, there was a subtype known as C, but was found to be one of the previously discovered subtypes. To avoid confusion, it was decided that there would never be a C subtype again and so if any new subtypes were discovered, naming would start with D. Agonists An agonist is a substance that binds to a receptor and triggers a response in the cell. ... In cell physiology, a secondary messenger system (also known as a second messenger system) is a method of cellular signalling where the signalling molecule does not enter the cell, but rather utilizes a cascade of events that transduces the signal into a cellular change. ... An adrenergic is a drug, or other substance, which has effects similar to, or the same as, epinephrine (adrenaline). ... An Adrenergic antagonist is a pharmaceutical substance that acts to inhibit the action of the adrenergic receptors. ... The alpha-1 adrenergic receptor (alpha-1-AR) is an adrenergic receptor with the primary effect of vasoconstriction. ... RNA expression pattern Orthologs Human Mouse Entrez Ensembl Uniprot Refseq Location Pubmed search The alpha-1A- receptor, also known as ADRA1A, is an alpha-1 adrenergic receptor, and also denotes the human gene encoding it. ... RNA expression pattern Orthologs Human Mouse Entrez Ensembl Uniprot Refseq Location Pubmed search The alpha-1B- receptor, also known as ADRA1B, is an alpha-1 adrenergic receptor, and also denotes the human gene encoding it. ... RNA expression pattern Orthologs Human Mouse Entrez Ensembl Uniprot Refseq Location Pubmed search The alpha-1D- receptor, also known as ADRA1D, is an alpha-1 adrenergic receptor, and also denotes the human gene encoding it. ... Isoprenaline is a synthetic derivative of noradrenaline that is not found in the body. ... Smooth muscle Layers of Esophageal Wall: 1. ... Gq protein is a heterotrimeric G protein subunit that activates phospholipase C (PLC). ... Phospholipase C is a key enzyme in phosphatidylinositol (PIP2) metabolism and lipid signaling pathways. ... Inositol triphosphate (also commonly known as inositol trisphosphate or triphosphoinositol; abbreviated InsP3 or IP3), together with diacylglycerol, is a second messenger molecule used in signal transduction in biological cells. ... For other uses, see Calcium (disambiguation). ... Norepinephrine, known as noradrenaline outside the USA, is a catecholamine and a phenethylamine with chemical formula C8H11NO3. ... Phenylephrine or Neo-Synephrine is an α-adrenergic receptor agonist used primarily as a decongestant, as an agent to dilate the pupil and to increase blood pressure. ... Methoxamine is an adrenergic agonist. ... Cirazoline is an adrenergic alpha-agonist. ... Alpha blockers (also called alpha-adrenergic blocking agents) constitute a variety of drugs which block α1-adrenergic receptors in arteries and smooth muscles. ... Phenoxybenzamine is a non-specific, irreversible alpha blocker used in the treatment of hypertension, and specifically that caused by pheochromocytoma. ... Phentolamine is a competitive nonselective alpha adrenergic receptor antagonist. ... Prazosin, brand name Minipress®, is a medication used to treat high blood pressure (hypertension). ... Tamsulosin (rINN) (IPA: ) is an α1a-selective alpha blocker used in the symptomatic treatment of benign prostatic hyperplasia (BPH). ... Terazosin (Hytrin) is an alpha blocker used for treatment of symptoms of prostate enlargement (BPH). ... Epinephrine Norepinephrine The adrenergic receptors (or adrenoceptors) are a class of G protein-coupled receptors that are targets of the catecholamines. ... RNA expression pattern Orthologs Human Mouse Entrez Ensembl Uniprot Refseq Location Pubmed search The alpha-2A- receptor, also known as ADRA2A, is an alpha-2 adrenergic receptor, and also denotes the human gene encoding it. ... Orthologs Human Mouse Entrez Ensembl na Uniprot na Refseq Location na Pubmed search The alpha-2B- receptor, also known as ADRA2B, is an alpha-2 adrenergic receptor, and also denotes the human gene encoding it. ... Orthologs Human Mouse Entrez Ensembl na Uniprot na Refseq Location na Pubmed search The alpha-2C- receptor, also known as ADRA2C, is an alpha-2 adrenergic receptor, and also denotes the human gene encoding it. ... Smooth muscle Layers of Esophageal Wall: 1. ... Gi alpha subunit is a heterotrimeric G protein subunit which inhibits the production of cAMP from ATP. 5-HT receptor type 1 uses this subunit. ... Epinephrine binds its receptor, that associates with an heterotrimeric G protein. ... Structure of cAMP cAMP represented in three ways, the left with sticks-representation, the middle with structure formula, and the right with space filled representation. ... Clonidine is a direct-acting adrenergic agonist prescribed historically as an anti-hypertensive agent. ... Lofexidine is an alpha2-adrenergic receptor agonist, can be used as a short acting (short half life) anti-hypertensive, but mostly used to help with relief from symptoms of heroin or opiate withdrawal in opiate dependency. ... Xylazine is a drug that is used for sedation, anesthesia, muscle relaxation, and analgesia. ... Tizanidine (Zanaflex, Sirdalud) is a centrally acting α-2 adrenergic agonist. ... Guanfacine is a centrally acting antihypertensive agent. ... Alpha blockers (also called alpha-adrenergic blocking agents) constitute a variety of drugs which block α1-adrenergic receptors in arteries and smooth muscles. ... Yohimbine, also known under the outdated names quebrachin, aphrodin, corynine, yohimvetol and hydroergotocin, is the principal alkaloid of the bark of the West-African tree Pausinystalia yohimbe Pierre (formerly Corynanthe yohimbe), family Rubiaceae (Madder family). ... RNA expression pattern Orthologs Human Mouse Entrez Ensembl Uniprot Refseq Location Pubmed search The beta-1- receptor, also known as ADRB1, is a beta-adrenergic receptor, and also denoted the human gene encoding it. ... Myocardium is the muscular tissue of the heart. ... G(s)alpha is a heterotrimeric G protein subunit which activates adenylate cyclase. ... Epinephrine binds its receptor, that associates with an heterotrimeric G protein. ... Structure of cAMP cAMP represented in three ways, the left with sticks-representation, the middle with structure formula, and the right with space filled representation. ... Norepinephrine, known as noradrenaline outside the USA, is a catecholamine and a phenethylamine with chemical formula C8H11NO3. ... Isoprenaline is a synthetic derivative of noradrenaline that is not found in the body. ... Dobutamine is a beta-1 adrenergic agonist. ... Beta blockers or beta-adrenergic blocking agents are a class of drugs used to treat a variety of cardiovascular conditions and some other diseases. ... “Minax” redirects here. ... Atenolol is a drug belonging to the group of beta blockers, a class of drugs used primarily in cardiovascular diseases. ... Expression pattern Orthologs Human Mouse Entrez Ensembl Uniprot Refseq Location Pubmed search Adrenergic, beta-2-, receptor, surface, also known as ADRB2, is a human gene and receptor. ... G(s)alpha is a heterotrimeric G protein subunit which activates adenylate cyclase. ... Epinephrine binds its receptor, that associates with an heterotrimeric G protein. ... Structure of cAMP cAMP represented in three ways, the left with sticks-representation, the middle with structure formula, and the right with space filled representation. ... Beta2-adrenergic receptor agonists are a class of drugs used to treat asthma and other pulmonary disease states. ... Salbutamol (INN) or albuterol (USAN) is a short-acting β2-adrenergic receptor agonist used for the relief of bronchospasm in conditions such as asthma and COPD. Salbutamol sulphate is usually given by the inhaled route for direct effect on bronchial smooth muscle. ... Salbutamol (INN) or albuterol (USAN) is a short-acting β2-adrenergic receptor agonist used for the relief of bronchospasm in conditions such as asthma and COPD. It is marketed by the Allen & Hanburys respiratory division of GlaxoSmithKline under the trade name Ventolin. ... Bitolterol mesylate (Tornalate®) is a β2-adrenergic receptor agonist used for the relief of bronchospasm in conditions such as asthma and COPD. Bitolterol has a rapid onset of action (2-5 minutes) and may last up to 6-8 hours. ... Formoterol belongs to the family of prescription-only medicines known as beta 2-agonists. ... Isoproterenol hydrochloride (Medihaler-Iso®) is a beta adrenergic receptor agonist medication, used as an inhaled aerosol to treat asthma. ... Levalbuterol (Xopenex®) is the R-enantiomer of the short-acting β2-adrenergic receptor agonist albuterol. ... Metaproterenol is used as a bronchodialator in the treatment of asthma. ... Salmeterol is a long-acting beta2-adrenergic receptor agonist drug that is currently prescribed for the treatment of asthma and chronic obstructive pulmonary disease COPD. It is currently available in both dry-powder inhalers (DPIs) and pressurised metered dose inhalers (pMDIs). ... The drug Terbutaline (trade names Brethine, Bricanyl, or Brethaire) is a β2-adrenergic receptor agonist, used as a fast-acting bronchodilator and off-label to delay premature labour as a tocolytic. ... Beta blockers or beta-adrenergic blocking agents are a class of drugs used to treat a variety of cardiovascular conditions and some other diseases. ... This page meets Wikipedias criteria for speedy deletion. ... Propranolol (INN) (IPA: ) is a non-selective beta blocker mainly used in the treatment of hypertension. ... Ritodrine hydrochloride (Yutopar®) is a tocolytic drug, used to stop premature labor. ... RNA expression pattern Orthologs Human Mouse Entrez Ensembl Uniprot Refseq Location Pubmed search The beta-3- receptor, also known as ADRB3, is a beta-adrenergic receptor, and also denotes the human gene encoding it. ... Lipolysis is the breakdown of fat stored in fat cells. ... G(s)alpha is a heterotrimeric G protein subunit which activates adenylate cyclase. ... Epinephrine binds its receptor, that associates with an heterotrimeric G protein. ... Structure of cAMP cAMP represented in three ways, the left with sticks-representation, the middle with structure formula, and the right with space filled representation. ... Beta blockers or beta-adrenergic blocking agents are a class of drugs used to treat a variety of cardiovascular conditions and some other diseases. ...

α receptors

α receptors have several functions in common, but also individual effects. Common effects include:

• Vasoconstriction of arteries to kidney (renal artery), heart (coronary artery), viscera, brain, erectile tissue and salivary glands.
• Vasoconstriction of veins
• Decrease motility of smooth muscle in gastrointestinal tract
• Contractions in male genitalia during ejaculation

The blood vessels are part of the circulatory system and function to transport blood throughout the body. ... Section of an artery An artery or arterial is also a class of highway. ... The kidneys are organs that filter wastes (such as urea) from the blood and excrete them, along with water, as urine. ... Human kidneys viewed from behind with spine removed The renal arteries normally arise off the abdominal aorta and supply the kidneys with blood. ... The heart and lungs, from an older edition of Grays Anatomy. ... The coronary circulation consists of the blood vessels that supply blood to, and remove blood from, the heart. ... In anatomy, the viscera are the internal organs of an animal, in particular the internal organs of the head, thorax and abdomen. ... The human brain In animals, the brain (enkephalos) (Greek for in the skull), is the control center of the central nervous system, responsible for behavior. ... Erectile tissue is tissue in the body that can become erect, usually by becoming engorged with blood. ... The salivary glands produce saliva, which keeps the mouth and other parts of the digestive system moist. ... In biology, a vein is a blood vessel which carries blood toward the heart. ... Smooth muscle Layers of Esophageal Wall: 1. ... Gut redirects here. ... A sex organ, or primary sexual characteristic, narrowly defined, is any of those anatomical parts of the body (which are not always bodily organs according to the strict definition) which are involved in sexual reproduction and constitute the reproductive system in a complex organism; namely: Male: penis (notably the glans... Ejaculation is the ejecting of semen from the penis, and is usually accompanied by orgasm. ...

α₁ receptor

Main article: Alpha-1 adrenergic receptor

Specific actions of the α₁ receptor include: The alpha-1 adrenergic receptor (alpha-1-AR) is an adrenergic receptor with the primary effect of vasoconstriction. ...

• Vasoconstriction in blood vessels of skin & gastrointestinal system

• Smooth muscle contraction in:
  • ureter
  • hairs (arrector pili muscles)
  • uterus (when pregnant)
  • urethral sphincter
  • ureters
  • bronchioles (although minor to the relaxing effect of β₂ receptor on bronchioles)

• urinary bladder contraction^[1][2]

• Smooth muscle relaxation in:
  • iris
• Positive ionotropic effect on heart muscle^[1].
• Secretion from salivary gland^[1].
• Increase salivary potassium levels.
• Glycogenolysis and gluconeogenesis from adipose tissue ^[1] and liver.
• Secretion from sweat glands ^[1].
• Na⁺ reabsorption from kidney^[1].

The blood vessels are part of the circulatory system and function to transport blood throughout the body. ... The blood vessels are part of the circulatory system and function to transport blood throughout the body. ... Beyond overall skin structure, refer below to: See-also. ... For the Physics term GUT, please refer to Grand unification theory The gastrointestinal or digestive tract, also referred to as the GI tract or the alimentary canal or the gut, is the system of organs within multicellular animals which takes in food, digests it to extract energy and nutrients, and... Smooth muscle Layers of Esophageal Wall: 1. ... Transverse section of ureter. ... For the 1968 stage production, see Hair (musical), for the 1979 film, see Hair (film). ... ... This article is about female reproductive anatomy. ... In mammals the flow of urine from the urinary bladder is controlled by a group of muscles collectively called the urethral sphincter, named for their proximity to the urethra. ... Transverse section of ureter. ... The bronchioles are the first airway branches that no longer contain cartilage. ... In anatomy, the urinary bladder is a hollow, muscular, and distensible (or elastic) organ that sits on the pelvic floor in mammals. ... Smooth muscle Layers of Esophageal Wall: 1. ... IRIS can refer to: A missile: IRIS (missile), an Iranian satellite launcher. ... An ionotropic effect is a special kind of effect of a hormone on its target. ... Myocardium is the muscular tissue of the heart. ... The salivary glands produce saliva, which keeps the mouth and other parts of the digestive system moist. ... General Name, symbol, number potassium, K, 19 Chemical series alkali metals Group, period, block 1, 4, s Appearance silvery white Standard atomic weight 39. ... Glycogen Glucose Glucose-6-phosphate Glycogenolysis is the catabolism of glycogen by removal of a glucose monomer and addition of phosphate to produce glucose-1-phosphate. ... Pyruvic acid Oxaloacetic acid Phosphoenolpyruvate Fructose 1,6-bisphosphate Fructose 6-phosphate Glucose-6-phosphate Glucose Gluconeogenesis is the generation of glucose from non-sugar carbon substrates like pyruvate, lactate, glycerol, and amino acids (primarily alanine and glutamine). ... Adipose tissue is one of the main types of connective tissue. ... For the bird, see Liver bird. ... In humans, there are four kinds of sudoriferous or sweat glands which differ greatly in both the composition of the sweat and its purpose. ... For sodium in the diet, see Edible salt. ... The kidneys are organs that filter wastes (such as urea) from the blood and excrete them, along with water, as urine. ...

α₂ receptor

There are 3 highly homologous subtypes of α₂ receptors: α2A, α2Β, and α2C. RNA expression pattern Orthologs Human Mouse Entrez Ensembl Uniprot Refseq Location Pubmed search The alpha-2A- receptor, also known as ADRA2A, is an alpha-2 adrenergic receptor, and also denotes the human gene encoding it. ... Orthologs Human Mouse Entrez Ensembl na Uniprot na Refseq Location na Pubmed search The alpha-2B- receptor, also known as ADRA2B, is an alpha-2 adrenergic receptor, and also denotes the human gene encoding it. ... Orthologs Human Mouse Entrez Ensembl na Uniprot na Refseq Location na Pubmed search Adrenergic, alpha-2C-, receptor, also known as ADRA2C, is a human gene. ...

Specific actions of the α₂ receptor include:

• Mediates synaptic transmission in pre- and postsynaptic nerve terminals.
• Inhibition^[3] of lipolysis in adipose tissue^[1].
• inhibition of insulin release in pancreas^[1].
• induction of glucagon from pancreas.
• aggregation of platelets
• contraction of sphincters of the gastrointestinal tract

Mediate is a song by INXS from their 1987 album, Kick. ... Synapses allow nerve cells to communicate with one another through axons and dendrites, converting electrical signals into chemical ones. ... Illustration of the major elements in a prototypical synapse. ... Lipolysis is the breakdown of fat stored in fat cells. ... Adipose tissue is one of the main types of connective tissue. ... Not to be confused with inulin. ... The pancreas is a gland organ in the digestive and endocrine systems of vertebrates. ... Glucagon ball and stick model A microscopic image stained for glucagon. ... A 250 ml bag of newly collected platelets. ... Look up Sphincter in Wiktionary, the free dictionary. ... Gut redirects here. ...

β receptors

As with α receptors, there are common actions of all β receptors, in addition to specific actions of each subtype. Common actions include:

• Stimulation of viscous, amylase-filldes secretions from salivary glands.

Amylase is the name given to glycoside hydrolase enzymes that break down starch into glucose molecules. ... The salivary glands produce saliva, which keeps the mouth and other parts of the digestive system moist. ...

β₁ receptor

Main article: Beta-1 receptor

Specific actions of the β₁ receptor include: ...

• Increase cardiac output
  • Increase heart rate ^[1] in sinoatrial node (SA node) (chronotropic effect)
  • Increase atrial cardiac muscle contractility. (inotropic effect)
  • Increases contractility and automaticity^[1] of ventricular cardiac muscle.
  • Increases conduction and automaticity^[1] of atrioventricular node (AV node)

• Renin release from juxtaglomerular cells^[1].

• Lipolysis in adipose tissue^[1].

• Receptor also present in cerebral cortex.

Cardiac output (CO) is the volume of blood being pumped by the heart, in particular by a ventricle in a minute. ... Heart rate is a term used to describe the frequency of the cardiac cycle. ... The sinoAtrial node (abbreviated SA node or SAN, also called the sinus node) is the impulse generating (pacemaker) tissue located in the right atrium of the heart, and thus the generator of sinus rhythm. ... In anatomy, the atrium (plural: atria) refers to a chamber or space. ... Cardiac muscle is a type of involuntary striated muscle found within the heart. ... The cardiac action potential is a specialized action potential in the heart, with unique properties necessary for function of the electrical conduction system of the heart. ... In the heart, a ventricle is a heart chamber which collects blood from an atrium (another heart chamber that is smaller than a ventricle) and pumps it out of the heart. ... The cardiac action potential is a specialized action potential in the heart, with unique properties necessary for function of the electrical conduction system of the heart. ... The atrioventricular node (abbreviated AV node) is an area of specialized tissue between the atria and the ventricles of the heart, which conducts the normal electrical impulse from the atria to the ventricles. ... Not to be confused with rennin, the active enzyme in rennet. ... JG cells In the kidney, the juxtaglomerular cells (JG cells, also known as granular cells) are cells that synthesize, store, and secrete the enzyme renin. ... Lipolysis is the breakdown of fat stored in fat cells. ... Adipose tissue is one of the main types of connective tissue. ... For other uses, see Cortex. ...

β₂ receptor

Main article: Beta-2 receptor

Specific actions of the β₂ receptor include: ...

Muscular system

• Smooth muscle relaxation in uterus (when non-pregnant)^[1], GI tract^[1], blood vessels^[1] and bronchi^[1] (agonists can be useful in treating asthma)
• Relax urinary sphincter.
• Relax detrusor urinae muscle‎ of bladder wall

Circulatory system Smooth muscle Layers of Esophageal Wall: 1. ... This article is about female reproductive anatomy. ... For the Physics term GUT, please refer to Grand unification theory The gastrointestinal or digestive tract, also referred to as the GI tract or the alimentary canal or the gut, is the system of organs within multicellular animals which takes in food, digests it to extract energy and nutrients, and... The blood vessels are part of the circulatory system and function to transport blood throughout the body. ... A bronchus (plural bronchi, adjective bronchial) is a caliber of airways in the the respiratory tract that conducts air into the lungs. ... Articles on Urethral sphincter include: Sphincter urethrae Internal sphincter muscle of urethra External sphincter muscle of urethra Category: ... The detrusor urinae muscle is a muscle of the urinary bladder wall. ... In anatomy, the urinary bladder is a hollow, muscular, and distensible (or elastic) organ that sits on the pelvic floor in mammals. ...

• Increase cardiac output (minor degree compared to β₁.
  • Increase heart rate ^[1] in sinoatrial node (SA node) (chronotropic effect)
  • Increase atrial cardiac muscle contractility. (inotropic effect)
  • Increases contractility and automaticity^[1] of ventricular cardiac muscle.
• Dilate hepatic artery
• Dilate arteries to skeletal muscle

digestive system Cardiac output (CO) is the volume of blood being pumped by the heart, in particular by a ventricle in a minute. ... Heart rate is a term used to describe the frequency of the cardiac cycle. ... The sinoAtrial node (abbreviated SA node or SAN, also called the sinus node) is the impulse generating (pacemaker) tissue located in the right atrium of the heart, and thus the generator of sinus rhythm. ... In anatomy, the atrium (plural: atria) refers to a chamber or space. ... Cardiac muscle is a type of involuntary striated muscle found within the heart. ... The cardiac action potential is a specialized action potential in the heart, with unique properties necessary for function of the electrical conduction system of the heart. ... In the heart, a ventricle is a heart chamber which collects blood from an atrium (another heart chamber that is smaller than a ventricle) and pumps it out of the heart. ... Hepatic artery is an artery that distributes blood to the liver, pancreas and gallbladder as well as to the stomach and duodenal portion of the small intestine. ... Section of an artery An artery or arterial is also a class of highway. ... A top-down view of skeletal muscle Skeletal muscle is a type of striated muscle, usually attached to the skeleton. ...

• Glycogenolysis and gluconeogenesis in liver^[1].
• Glycogenolysis and lactate release in skeletal muscle^[1].
• Contract sphincters of GI tract
• Insulin secretion from pancreas^[1][4]
• Thickened secretions from salivary glands^[1].

Other Glycogen Glucose Glucose-6-phosphate Glycogenolysis is the catabolism of glycogen by removal of a glucose monomer and addition of phosphate to produce glucose-1-phosphate. ... Pyruvic acid Oxaloacetic acid Phosphoenolpyruvate Fructose 1,6-bisphosphate Fructose 6-phosphate Glucose-6-phosphate Glucose Gluconeogenesis is the generation of glucose from non-sugar carbon substrates like pyruvate, lactate, glycerol, and amino acids (primarily alanine and glutamine). ... Glycogen Glucose Glucose-6-phosphate Glycogenolysis is the catabolism of glycogen by removal of a glucose monomer and addition of phosphate to produce glucose-1-phosphate. ... Lactic acid is a chemical compound that plays a role in several biochemical processes. ... A top-down view of skeletal muscle Skeletal muscle is a type of striated muscle, usually attached to the skeleton. ... From late Latin sphincter, from Greek sphinkter, band, contractile muscle, from sphingein, to bind tight. ... For the Physics term GUT, please refer to Grand unification theory The gastrointestinal or digestive tract, also referred to as the GI tract or the alimentary canal or the gut, is the system of organs within multicellular animals which takes in food, digests it to extract energy and nutrients, and... Not to be confused with inulin. ... The pancreas is a gland organ in the digestive and endocrine systems of vertebrates. ... The salivary glands produce saliva, which keeps the mouth and other parts of the digestive system moist. ...

• Inhibit histamine-release from mast cells
• Increase protein content of secretions from lacrimal glands
• Increase renin secretion from kidney
• Receptor also present in cerebellum.

This article or section does not cite any references or sources. ... A mast cell (or mastocyte) is a resident cell of connective tissue that contains many granules rich in histamine and heparin. ... The lacrimal glands are paired glands, one for each eye, that secrete the aqueous layer of the tear film. ... Not to be confused with rennin, the active enzyme in rennet. ... The kidneys are organs that filter wastes (such as urea) from the blood and excrete them, along with water, as urine. ... The cerebellum (Latin: little brain) is a region of the brain that plays an important role in the integration of sensory perception and motor output. ...

β₃ receptor

Main article: Beta-3 receptor

Specific actions of the β₃ receptor include: ...

• Enhancement of lipolysis in adipose tissue.

Lipolysis is the breakdown of fat stored in fat cells. ... Adipose tissue is one of the main types of connective tissue. ...

Structure

The 3D crystallographic structure of the β₂-adrenergic receptor has been determined (PDB 2R4R, 2R4S, 2RH1).^[5][6][7] The Protein Data Bank (PDB) is a repository for 3-D structural data of proteins and nucleic acids. ...

Diagrams

Epinephrine binds its receptor, that associates with an heterotrimeric G protein. The G protein associates with adenylate cyclase that converts ATP to cAMP, spreading the signal (more details...)

Image File history File links Download high-resolution version (837x481, 71 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Adenylate cyclase Cyclic adenosine monophosphate Epinephrine Adrenergic receptor ... Image File history File links Download high-resolution version (837x481, 71 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Adenylate cyclase Cyclic adenosine monophosphate Epinephrine Adrenergic receptor ...

See also

• Beta adrenergic receptor kinase
• Beta adrenergic receptor kinase-2

// Upon stimulation of the B-adrenergic receptor by epinephrine, Gs will be activated. ... RNA expression pattern Orthologs Human Mouse Entrez Ensembl Uniprot Refseq Location Pubmed search Adrenergic, beta, receptor kinase 2, also known as ADRBK2, is a human gene. ...

References

A digital object identifier (or DOI) is a standard for persistently identifying a piece of intellectual property on a digital network and associating it with related data, the metadata, in a structured extensible way. ... A digital object identifier (or DOI) is a standard for persistently identifying a piece of intellectual property on a digital network and associating it with related data, the metadata, in a structured extensible way. ... A digital object identifier (or DOI) is a standard for persistently identifying a piece of intellectual property on a digital network and associating it with related data, the metadata, in a structured extensible way. ... A digital object identifier (or DOI) is a standard for persistently identifying a piece of intellectual property on a digital network and associating it with related data, the metadata, in a structured extensible way. ...

Further reading

• Rang HP, Dale MM, Ritter JM, Moore PK (2003). "Ch. 11", Pharmacology. Elsevier Churchill Livingstone. ISBN 0-443-07145-4. 
• Rang HP, Dale MM, Ritter JM, Flower RJ (2007). "Ch. 11", Rang and Dale's Pharmacology. Elsevier Churchill Livingstone, 169-170. ISBN 0-443-06911-5. 

External links

• The Adrenergic Receptors
• IUPHAR GPCR Database - Adrenoceptors
• Basic Neurochemistry: α- and β-Adrenergic Receptors
• Brief overview of functions of the beta-3 receptor
• Theory of receptor activation
• Desensitization of beta-1-receptors
• UMich Orientation of Proteins in Membranes protein/pdbid-2rh1 - 3D structure of beta-2 adrenergic receptor in membrane