Epinephrine (adrenaline), a catecholamine-type hormone

Hormones (from Greek ὁρμή - "impetus") are chemicals released by cells that affect cells in other parts of the body. Only a small amount of hormone is required to alter cell metabolism.It is also a chemical messenger that transports a signal from one cell to another. All multicellular organisms produce hormones; plant hormones are also called phytohormones. Hormones in animals are often transported in the blood. Cells respond to a hormone when they express a specific receptor for that hormone. The hormone binds to the receptor protein, resulting in the activation of a signal transduction mechanism that ultimately leads to cell type-specific responses. Hormone may refer to: Hormone Hormone is also the NATO reporting name for the Soviet/Russian Kamov Ka-25 military helicopter. ... Image File history File links Size of this preview: 800 × 561 pixelsFull resolution (1087 × 762 pixel, file size: 3 KB, MIME type: image/png) High-resolution black/white . ... Image File history File links Size of this preview: 800 × 561 pixelsFull resolution (1087 × 762 pixel, file size: 3 KB, MIME type: image/png) High-resolution black/white . ... Adrenaline redirects here. ... 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. ... Wild-type Caenorhabditis elegans hermaphrodite stained to highlight the nuclei of all cells Multicellular organisms are organisms consisting of more than one cell, and having differentiated cells that perform specialized functions. ... For other uses, see Plant (disambiguation). ... Plant hormones (or plant growth regulators, or PGRs) are internally secreted chemicals in plants that are used for regulating their growth. ... For other uses, see Animal (disambiguation). ... Gene expression, or simply expression, is the process by which the inheritable information which comprises a gene, such as the DNA sequence, is made manifest as a physical and biologically functional gene product, such as protein or RNA. Several steps in the gene expression process may be modulated, including the... 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. ... In biology, signal transduction refers to any process by which a cell converts one kind of signal or stimulus into another, most often involving ordered sequences of biochemical reactions inside the cell, that are carried out by enzymes and linked through second messengers resulting in what is thought of as...

Endocrine hormone molecules are secreted (released) directly into the bloodstream, while exocrine hormones (or ectohormones) are secreted directly into a duct, and from the duct they either flow into the bloodstream or they flow from cell to cell by diffusion in a process known as paracrine signalling. The endocrine system is an integrated system of small organs that involve the release of extracellular signaling molecules known as hormones. ... 3D (left and center) and 2D (right) representations of the terpenoid molecule atisane. ... Red blood cells (erythrocytes) are present in the blood and help carry oxygen to the rest of the cells in the body Blood is a circulating tissue composed of fluid plasma and cells (red blood cells, white blood cells, platelets). ... Exocrine gland refers to glands that secrete their products and temporarily store their secretions in a duct. ... diffusion (disambiguation). ... Paracrine signaling is a form of cell signaling in which the target cell is close to (para = alongside of or next to, but this strict prefix definition is not meticulously followed here) the signal releasing cell. ...

Hierarchical nature of hormonal control

Hormonal regulation of some physiological activities involves a hierarchy of cell types acting on each other either to stimulate or to modulate the release and action of a particular hormone. The secretion of hormones from successive levels of endocrine cells is stimulated by chemical signals originating from cells higher up the hierarchical system. The master coordinator of hormonal activity in mammals is the hypothalamus, which acts on input that it receives from the central nervous system.^[1] The endocrine system is an integrated system of small organs that involve the release of extracellular signaling molecules known as hormones. ... Subclasses & Infraclasses Subclass †Allotheria* Subclass Prototheria Subclass Theria Infraclass †Trituberculata Infraclass Metatheria Infraclass Eutheria For the folk-rock band see The Mammals. ... The hypothalamus links the nervous system to the endocrine system via the pituitary gland (hypophysis). ... A diagram showing the CNS: 1. ...

Other hormone secretion occurs in response to local conditions, such as the rate of secretion of parathyroid hormone by the parathyroid cells in response to fluctuations of ionized calcium levels in extracellular fluid. RNA expression pattern Orthologs Human Mouse Entrez Ensembl Uniprot na Refseq Location Pubmed search Parathyroid hormone (PTH), or parathormone, is secreted by the parathyroid glands as a polypeptide containing 84 amino acids. ... Categories: Anatomy stubs | Endocrine system ... For other uses, see Calcium (disambiguation). ... In some animals, including mammals, the two types of extracellular fluids are interstitial fluid and blood plasma. ...

Hormone signaling

Hormonal signalling across this hierarchy involves the following:

1. Biosynthesis of a particular hormone in a particular tissue
2. Storage and secretion of the hormone
3. Transport of the hormone to the target cell(s)
4. Recognition of the hormone by an associated cell membrane or intracellular receptor protein.
5. Relay and amplification of the received hormonal signal via a signal transduction process: This then leads to a cellular response. The reaction of the target cells may then be recognized by the original hormone-producing cells, leading to a down-regulation in hormone production. This is an example of a homeostatic negative feedback loop.
6. Degradation of the hormone.

As can be inferred from the hierarchical diagram, hormone biosynthetic cells are typically of a specialized cell type, residing within a particular endocrine gland (e.g., the thyroid gland, the ovaries, or the testes). Hormones may exit their cell of origin via exocytosis or another means of membrane transport. However, the hierarchical model is an oversimplification of the hormonal signaling process. Cellular recipients of a particular hormonal signal may be one of several cell types that reside within a number of different tissues, as is the case for insulin, which triggers a diverse range of systemic physiological effects. Different tissue types may also respond differently to the same hormonal signal. Because of this, hormonal signaling is elaborate and hard to dissect. Protein biosynthesis (synthesis) is the process in which cells build proteins. ... Exocytosis is the process of a biological cell releasing substances into the extracellular fluid (its environment). ... A membrane protein is a protein molecule that is attached to, or associated with the membrane of a cell or an organelle. ... In cell biology, molecular biology and related fields, the word intracellular means inside the cell. It is used in contrast to extracellular (outside the cell). ... 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. ... In biology, signal transduction refers to any process by which a cell converts one kind of signal or stimulus into another, most often involving ordered sequences of biochemical reactions inside the cell, that are carried out by enzymes and linked through second messengers resulting in what is thought of as... Downregulation is the process by which a cell decreases the number of receptors to a given hormone or neurotransmitter to reduce its sensitivity to this molecule. ... Homeostasis (from Greek: ὅμος, homos, equal; and ιστημι, histemi, to stand lit. ... Negative feedback is a type of feedback, during which a system responds so as to reverse the direction of change. ... The endocrine system is an integrated system of small organs that involve the release of extracellular signaling molecules known as hormones. ... The thyroid gland and its relations In anatomy, the thyroid (IPA θaɪɹoɪd) is an endocrine gland. ... // For ovary as part of plants see ovary (plants) An ovary is an egg-producing reproductive organ found in female organisms. ... Human male anatomy The testicles, known medically as testes (singular testis), are the male generative glands in animals. ... Neuron A (transmitting) to neuron B (receiving) 1. ... The cell membrane (also called the plasma membrane, plasmalemma or phospholipid bilayer) is a selectively permeable lipid bilayer found in all cells. ... Not to be confused with inulin. ...

Interactions with receptors

Most hormones initiate a cellular response by initially combining with either a specific intracellular or cell membrane associated receptor protein. A cell may have several different receptors that recognize the same hormone and activate different signal transduction pathways, or alternatively different hormones and their receptors may invoke the same biochemical pathway. In cell biology, molecular biology and related fields, the word intracellular means inside the cell. It is used in contrast to extracellular (outside the cell). ... A membrane protein is a protein molecule that is attached to, or associated with the membrane of a cell or an organelle. ... 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. ... In biology, signal transduction refers to any process by which a cell converts one kind of signal or stimulus into another, most often involving ordered sequences of biochemical reactions inside the cell, that are carried out by enzymes and linked through second messengers resulting in what is thought of as...

For many hormones, including most protein hormones, the receptor is membrane associated and embedded in the plasma membrane at the surface of the cell. The interaction of hormone and receptor typically triggers a cascade of secondary effects within the cytoplasm of the cell, often involving phosphorylation or dephosphorylation of various other cytoplasmic proteins, changes in ion channel permeability, or increased concentrations of intracellular molecules that may act as secondary messengers (e.g. cyclic AMP). Some protein hormones also interact with intracellular receptors located in the cytoplasm or nucleus by an intracrine mechanism. Peptide hormones are a class of peptides that are secreted into the blood stream and have endocrine functions in living animals. ... Drawing of a cell membrane A component of every biological cell, the cell membrane (or plasma membrane) is a thin and structured bilayer of phospholipid and protein molecules that envelopes the cell. ... Schematic showing the cytoplasm, with major components of a typical animal cell. ... A phosphorylated serine residue Phosphorylation is the addition of a phosphate (PO4) group to a protein molecule or a small molecule. ... Ion channels are pore-forming proteins that help to establish and control the small voltage gradient that exists across the plasma membrane of all living cells (see cell potential) by allowing the flow of ions down their electrochemical gradient. ... In biology, second messengers are low-weight diffusible molecules that are used in signal transduction to relay signals within a cell. ... 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). ... Peptide hormones are a class of peptides that are secreted into the blood stream and have endocrine functions in living animals. ... In cell biology, molecular biology and related fields, the word intracellular means inside the cell. It is used in contrast to extracellular (outside the cell). ... Schematic showing the cytoplasm, with major components of a typical animal cell. ... HeLa cells stained for DNA with the Blue Hoechst dye. ... There are very few or no other articles that link to this one. ...

For hormones such as steroid or thyroid hormones, their receptors are located intracellularly within the cytoplasm of their target cell. In order to bind their receptors these hormones must cross the cell membrane. The combined hormone-receptor complex then moves across the nuclear membrane into the nucleus of the cell, where it binds to specific DNA sequences, effectively amplifying or suppressing the action of certain genes, and affecting protein synthesis.^[2] However, it has been shown that not all steroid receptors are located intracellularly, some are plasma membrane associated.^[3] Steroid hormones are steroids which act as hormones. ... In cell biology, molecular biology and related fields, the word intracellular means inside the cell. It is used in contrast to extracellular (outside the cell). ... Schematic showing the cytoplasm, with major components of a typical animal cell. ... A protein complex is a group of two or more associated proteins formed by protein-protein interaction that is stable over time. ... A DNA sequence (sometimes genetic sequence) is a succession of letters representing the primary structure of a real or hypothetical DNA molecule or strand, The possible letters are A, C, G, and T, representing the four nucleotide subunits of a DNA strand (adenine, cytosine, guanine, thymine), and typically these are... This stylistic schematic diagram shows a gene in relation to the double helix structure of DNA and to a chromosome (right). ... Protein synthesis is the creation of proteins using DNA and RNA. Biological and artificial methods for creation of proteins differ significantly. ... In cell biology, molecular biology and related fields, the word intracellular means inside the cell. It is used in contrast to extracellular (outside the cell). ... Drawing of a cell membrane A component of every biological cell, the cell membrane (or plasma membrane) is a thin and structured bilayer of phospholipid and protein molecules that envelopes the cell. ...

An important consideration, dictating the level at which cellular signal transduction pathways are activated in response to a hormonal signal is the effective concentration of hormone-receptor complexes that are formed. Hormone-receptor complex concentrations are effectively determined by three factors: In biology, signal transduction refers to any process by which a cell converts one kind of signal or stimulus into another, most often involving ordered sequences of biochemical reactions inside the cell, that are carried out by enzymes and linked through second messengers resulting in what is thought of as... For other uses, see Concentration (disambiguation). ...

1. The number of hormone molecules available for complex formation
2. The number of receptor molecules available for complex formation and
3. The binding affinity between hormone and receptor.

The number of hormone molecules available for complex formation is usually the key factor in determining the level at which signal transduction pathways are activated. The number of hormone molecules available being determined by the concentration of circulating hormone, which is in turn influenced by the level and rate at which they are secreted by biosynthetic cells. The number of receptors at the cell surface of the receiving cell can also be varied as can the affinity between the hormone and its receptor. In chemistry and biochemistry, a dissociation constant or an ionization constant is a specific type of equilibrium constant used for reversible reactions or processes. ... In biology, signal transduction refers to any process by which a cell converts one kind of signal or stimulus into another, most often involving ordered sequences of biochemical reactions inside the cell, that are carried out by enzymes and linked through second messengers resulting in what is thought of as... In chemistry and biochemistry, a dissociation constant or an ionization constant is a specific type of equilibrium constant used for reversible reactions or processes. ...

Physiology of hormones

Most cells are capable of producing one or more molecules, which act as signalling molecules to other cells, altering their growth, function, or metabolism. The classical hormones produced by cells in the endocrine glands mentioned so far in this article are cellular products, specialized to serve as regulators at the overall organism level. However they may also exert their effects solely within the tissue in which they are produced and originally released. An endocrine gland is one of a set of internal organs involved in the secretion of hormones into the blood. ...

The rate of hormone biosynthesis and secretion is often regulated by a homeostatic negative feedback control mechanism. Such a mechanism depends on factors which influence the metabolism and excretion of hormones. Thus, higher hormome concentration alone can not trigger the negative feedback mechanism. Negative feedback must be triggered by overproduction of an "effect" of the hormone. Homeostasis (from Greek: ὅμος, homos, equal; and ιστημι, histemi, to stand lit. ... This article does not cite any references or sources. ... Structure of the coenzyme adenosine triphosphate, a central intermediate in energy metabolism. ... The kidneys are important excretory organs in vertebrates. ...

Hormone secretion can be stimulated and inhibited by:

• Other hormones (stimulating- or releasing-hormones)
• Plasma concentrations of ions or nutrients, as well as binding globulins
• Neurons and mental activity
• Environmental changes, e.g., of light or temperature

One special group of hormones is the tropic hormones that stimulate the hormone production of other endocrine glands. For example, thyroid-stimulating hormone (TSH) causes growth and increased activity of another endocrine gland, the thyroid, which increases output of thyroid hormones. Globulin is one of the two types of serum proteins, the other being albumin. ... This article is about cells in the nervous system. ... Trophic hormones are hormones that regulate the activity of endocrine glands. ... The endocrine system is an integrated system of small organs that involve the release of extracellular signaling molecules known as hormones. ... Thyroid-stimulating hormone (also known as TSH or thyrotropin) is a hormone synthesized and secreted by thyrotrope cells in the anterior pituitary gland which regulates the endocrine function of the thyroid gland. ... thyroxine (T4) triiodothyronine (T3) Thyroxine, T4 Triiodothyronine, T3 The thyroid hormones, thyroxine (T4) and triiodothyronine (T3), are tyrosine-based hormones produced by the thyroid gland. ...

A recently-identified class of hormones is that of the "hunger hormones" - ghrelin, orexin and PYY 3-36 - and "satiety hormones" - e.g., leptin, obestatin, nesfatin-1. Ghrelin is a hormone produced by P/D1 cells lining the acer of the human stomach that stimulate appetite. ... Orexins, also called hypocretins, are the common names given to a pair of highly excitatory neuropeptide hormones that were simultaneously discovered by two groups of reseachers in rat brains. ... In biology, the hormone called PYY 3-36 plays a critical role in decreasing appetites, making us aware of fullness of our stomach. ... RNA expression pattern Orthologs Human Mouse Entrez Ensembl Uniprot Refseq Location Pubmed search Leptin (from the Greek word leptos, meaning thin) is a 16 kDa protein hormone that plays a key role in regulating energy intake and energy expenditure, including the regulation (decrease) of appetite and (increase) of metabolism. ... Obestatin is a hormone that is produced in the cells linings the stomach and small intestine of several mammals including humans; it drastically reduces appetite in mice and is expected to do the same in humans. ... Nesfatin-1 is a naturally occurring protein molecule produced by the brain of mammals. ...

In order to release active hormones quickly into the circulation, hormone biosynthetic cells may produce and store biologically inactive hormones in the form of pre- or prohormones. These can then be quickly converted into their active hormone form in response to a particular stimulus. The word circulation can mean the following: The transport of blood through the circulatory system. ... A prehormone is a biochemical substance secreted by glandular tissue and has minimal or no significant biological activity, but it is converted in peripheral tissues into an active hormone. ... A prohormone is a chemical compound that is a precursor to an actual hormone (usually an anabolic like testosterone or some variant), which is taken in order to boost the body’s available hormone supply. ...

Hormone effects

Hormone effects vary widely, but can include:

• stimulation or inhibition of growth,
• In puberty hormones can affect mood and mind
• induction or suppression of apoptosis (programmed cell death)
• activation or inhibition of the immune system
• regulating metabolism
• preparation for a new activity (e.g., fighting, fleeing, mating)
• preparation for a new phase of life (e.g., puberty, caring for offspring, menopause)
• controlling the reproductive cycle

In many cases, one hormone may regulate the production and release of other hormones Look up mood in Wiktionary, the free dictionary. ... For other uses, see Mind (disambiguation). ... A section of mouse liver showing an apoptotic cell indicated by an arrow Apoptosis (/̩æ.pÉ™pˈto. ... A scanning electron microscope image of a single neutrophil (yellow), engulfing anthrax bacteria (orange). ... Structure of the coenzyme adenosine triphosphate, a central intermediate in energy metabolism. ... This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... This article or section does not cite its references or sources. ... IT FEELS REALLY GOOD IF YOU IMATATE THE ANIMALS. LOL! “Mounting” redirects here. ... Puberty refers to the process of physical changes by which a childs body becomes an adult body capable of reproduction. ...   It has been suggested that Child discipline be merged into this article or section. ... The word menopause literally means the permanent physiological, or natural, cessation of menstrual cycles, from the Greek roots meno (month) and pausis (a pause, a cessation). ... The reproduction of many organisms follows a cyclical pattern, known as the reproductive cycle, which regulates the conception and birth of offspring. ...

Many of the responses to hormone signals can be described as serving to regulate metabolic activity of an organ or tissue.

Chemical classes of hormones

Vertebrate hormones fall into three chemical classes: This article does not cite any references or sources. ...

• Amine-derived hormones are derivatives of the amino acids tyrosine and tryptophan. Examples are catecholamines and thyroxine.
• Peptide hormones consist of chains of amino acids. Examples of small peptide hormones are TRH and vasopressin. Peptides composed of scores or hundreds of amino acids are referred to as proteins. Examples of protein hormones include insulin and growth hormone. More complex protein hormones bear carbohydrate side chains and are called glycoprotein hormones. Luteinizing hormone, follicle-stimulating hormone and thyroid-stimulating hormone are glycoprotein hormones.
• Lipid and phospholipid-derived hormones derive from lipids such as linoleic acid and arachidonic acid and phospholipids. The main classes are the steroid hormones that derive from cholesterol and the eicosanoids. Examples of steroid hormones are testosterone and cortisol. Sterol hormones such as calcitriol are a homologous system. The adrenal cortex and the gonads are primary sources of steroid hormones. Examples of eicosanoids are the widely studied prostaglandins.

The general structure of an amine Amines are organic compounds and a type of functional group that contain nitrogen as the key atom. ... This article is about the class of chemicals. ... Tyrosine (from the Greek tyros, meaning cheese, as it was first discovered in 1846 by German chemist Justus von Liebig in the protein casein from cheese[1][2]), 4-hydroxyphenylalanine, or 2-amino-3(4-hydroxyphenyl)-propanoic acid, is one of the 20 amino acids that are used by cells... Tryptophan (abbreviated as Trp or W)[1] is one of the 20 standard amino acids, which are the building blocks of proteins, and an essential amino acid in the human diet. ... 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. ... Thyroxine, or 3:5,3:5 tetra­iodothyronine (often abbreviated as T4) is the major hormone secreted by the follicular cells of the thyroid gland. ... Peptide hormones are a class of peptides that are secreted into the blood stream and have endocrine functions in living animals. ... Thyrotropin-releasing hormone (TRH), also called thyrotropin-releasing factor (TRF) or protirelin, is a tripeptide hormone that stimulates the release of thyroid-stimulating hormone and prolactin by the anterior pituitary. ... RNA expression pattern Orthologs Human Mouse Entrez Ensembl Uniprot Refseq Location Pubmed search Arginine vasopressin (AVP), also known as vasopressin, argipressin or antidiuretic hormone (ADH), is a hormone found in most mammals, including humans. ... A representation of the 3D structure of myoglobin showing coloured alpha helices. ... Not to be confused with inulin. ... Lactose is a disaccharide found in milk. ... N-linked protein glycosylation (N-glycosylation of N-glycans) at Asn residues (Asn-x-Ser/Thr motifs) in glycoproteins[1]. Glycoproteins are proteins that contain oligosaccharide chains (glycans) covalently attached to their polypeptide backbones. ... Luteinizing hormone (LH) is a hormone synthesized and secreted by gonadotropes in the anterior lobe of the pituitary gland. ... Follicle stimulating hormone Follicle stimulating hormone (FSH) is a hormone synthesised and secreted by gonadotropes in the anterior pituitary gland. ... Thyroid-stimulating hormone (also known as TSH or thyrotropin) is a hormone synthesized and secreted by thyrotrope cells in the anterior pituitary gland which regulates the endocrine function of the thyroid gland. ... Some common lipids. ... Phospholipid Two schematic representations of a phospholipid. ... Linoleic acid (LA) is an unsaturated omega-6 fatty acid. ... Arachidonic acid (AA) is an omega-6 fatty acid 20:4(ω-6). ... Steroid hormones are steroids which act as hormones. ... Cholesterol is a sterol (a combination steroid and alcohol). ... In biochemistry, eicosanoids are a class of oxygenated hydrophobic molecules that largely function as autocrine and paracrine mediators. ... Steroid hormones are steroids which act as hormones. ... Testosterone is a steroid hormone from the androgen group. ... Cortisol is a corticosteroid hormone produced by the Zona fasciculata of the adrenal cortex (in the adrenal gland). ... Sterols, or steroid alcohols are a subgroup of steroids with a hydroxyl group in the 3-position of the A-ring. ... Vitamin D is a fat soluble vitamin that contributes to the maintenance of normal levels of calcium and phosphorus in the bloodstream. ... In biology, homology is any similarity between structures that is due to their shared ancestry. ... Cortical part of the adrenal gland (on the pointer). ... The gonad is the organ that makes gametes. ... In biochemistry, eicosanoids are a class of oxygenated hydrophobic molecules that largely function as autocrine and paracrine mediators. ... E1 - Alprostadil I2 - Prostacyclin A prostaglandin is any member of a group of lipid compounds that are derived enzymatically from fatty acids and have important functions in the animal body. ...

Pharmacology

Many hormones and their analogues are used as medication. The most commonly-prescribed hormones are estrogens and progestagens (as methods of hormonal contraception and as HRT), thyroxine (as levothyroxine, for hypothyroidism) and steroids (for autoimmune diseases and several respiratory disorders). Insulin is used by many diabetics. Local preparations for use in otolaryngology often contain pharmacologic equivalents of adrenaline, while steroid and vitamin D creams are used extensively in dermatological practice. In chemistry, analogs or analogues are compounds in which one or more individual atoms have been replaced, either with a different atom, or with a different functional group. ... This article does not cite any references or sources. ... Estriol. ... Progestagens (also spelled progestogens or gestagens) are hormones which produce effects similar to progesterone, the only natural progestagen. ... Hormonal contraception refers to birth control methods that act on the hormonal system. ... Hormone replacement therapy (HRT) is a system of medical treatment for perimenopausal and postmenopausal women, based on the assumption that it may prevent discomfort and health problems caused by diminished circulating estrogen hormones. ... Thyroxine, or 3:5,3:5 tetra­iodothyronine (often abbreviated as T4) is the major hormone secreted by the follicular cells of the thyroid gland. ... Levothyroxine, also known as L-thyroxine, synthetic T4 or 3,5,3,5-tetraiodo-L-thyronine, is a synthetic form of thyroxine (thyroid hormone). ... This article or section does not cite its references or sources. ... This article is about the chemical family of steroids. ... Autoimmune diseases arise from an overactive immune response of the body against substances and tissues normally present in the body. ... In medicine, pulmonology (aka pneumology) is the specialty that deals with diseases of the lungs and the respiratory tract. ... Not to be confused with inulin. ... For the disease characterized by excretion of large amounts of very dilute urine, see diabetes insipidus. ... Otolaryngology is the branch of medicine that specializes in the diagnosis and treatment of ear, nose, throat, and head & neck disorders. ... Pharmacology (in Greek: pharmakon (φάρμακον) meaning drug, and lego (λέγω) to tell (about)) is the study of how drugs interact with living organisms to produce a change in function. ... Epinephrine (INN) or adrenaline (BAN) is a hormone and a neurotransmitter. ... This article is about the chemical family of steroids. ... Vitamin D is a fat soluble vitamin that contributes to the maintenance of normal levels of calcium and phosphorus in the bloodstream. ... Dermatology (Greek δερμα, skin and λόγος, word, science) is a branch of medicine dealing with the skin and its appendages (hair, sweat glands, etc). ...

A "pharmacologic dose" of a hormone is a medical usage referring to an amount of a hormone far greater than naturally occurs in a healthy body. The effects of pharmacologic doses of hormones may be different from responses to naturally-occurring amounts and may be therapeutically useful. An example is the ability of pharmacologic doses of glucocorticoid to suppress inflammation. Glucocorticoids are a class of steroid hormones characterised by an ability to bind with the cortisol receptor and trigger similar effects. ... An abscess on the skin, showing the redness and swelling characteristic of inflammation. ...

Important human hormones

Spelling is not uniform for many hormones. Current North American and international usage is estrogen, gonadotropin, while British usage retains the Greek diphthong in oestrogen and favors the earlier spelling gonadotrophin (from trophē ‘nourishment, sustenance’ rather than tropē ‘turning, change’. In phonetics, a diphthong (also gliding vowel) (Greek δίφθογγος, diphthongos, literally with two sounds, or with two tones) is a monosyllabic vowel combination involving a quick but smooth movement from one vowel to another, often interpreted by listeners as a single vowel sound or phoneme. ...