NationMaster - Encyclopedia: Bitter taste

The basic tastes are the commonly recognized types of taste sensed by humans. Humans receive tastes through sensory organs called taste buds or gustatory calyculi, concentrated on the upper surface of the tongue. Scientists describe seven basic tastes: bitter, salty, sour, astringent, sweet, pungent (eg chili), and umami. This last being from a number of recent scientific publications about new basic tastes,^{[citation needed]} also termed savoury (the flavour of certain glutamates). Asian cooking has long recognized umami as a flavour. Taste is one of the most common and fundamental of the senses of animals. ... Senses are the physiological methods of perception. ... Trinomial name Homo sapiens sapiens Linnaeus, 1758 Humans, or human beings, are bipedal primates belonging to the mammalian species Homo sapiens (Latin for wise man or knowing man) under the family Hominidae (known as the great apes). ... Taste buds are small structures on the upper surface of the tongue, soft palate, and epiglottis that provide information about the taste of food being eaten. ... A human tongue The tongue is the large bundle of skeletal muscles on the floor of the mouth that manipulates food for chewing and swallowing, (deglutition). ... Human taste sensory organs, called taste buds or gustatory calyculi, and concentrated on the upper surface of the tongue, appear to be receptive to relatively few chemical species as tastes. ... Glutamate is the anion of glutamic acid. ...

There is scientific dispute as to whether basic tastes exist per se or are simply an overly reductionist concept. There is also philosophical dispute between biochemists, who believe evidence for a chemical reaction in tongue tissue means there is a basic taste, and psychologists, who see taste as much more based on psychological states and experiences.^{[citation needed]} Biochemistry is the study of the chemical processes and transformations in living organisms. ... A psychologist is a scientist and/or clinician who studies psychology, the systematic investigation of the human mind, including behavior and cognition. ...

Psychologists speak more about "flavour profiles" than tastes, based on the ways people report experiencing taste. Such reports and testing tend to show even the classic four basic tastes shading into each other on a spectrum of experience.^{[citation needed]}

Ancient history

In Western culture, the concept of basic tastes can be traced back at least to Aristotle, who cited "sweet" and "bitter," with "succulent," "salt," "pungent," "harsh," "astringent" and "acid" as elaborations of those two basics. The ancient Chinese Five Elements philosophy lists slightly different five basic tastes: bitter, salty, sour, sweet, and hot. Aristotle (Greek: AristotÃ©lÄ“s) (384 BC â€“ March 7, 322 BC) was an ancient Greek philosopher, a student of Plato and teacher of Alexander the Great. ... Chinese Wood (æœ¨) | Fire (ç«) | Earth (åœŸ) | Metal (é‡‘) | Water (æ°´) Hinduism The Panchamahabhuta (five great elements) Prithvi/Bhumi (Earth) Ap/Jala (Water) Agni/Tejas (Fire) Vayu/Pavan (Air/Wind) Akasha (Aether) In traditional Chinese philosophy, natural phenomena can be classified into the Five Elements (Chinese: äº”è¡Œ; Pinyin: wÇ”xÃng): wood, fire, earth, metal, and...

Historically, the science of how humans sense taste has been full of misunderstandings and conflicting claims. The concept of basic tastes is probably too simplistic and does not account for more complex reactions sometimes described as "mouthfeel," or for tastes such as metallic that are generally not considered food-oriented. The major problem is confusion between the concept of taste, which generally refers to stimuli directly affecting the tongue, and flavour, which involves olfaction as well. Many obvious sensations, such as hot and astringent are still recognized by science, but considered "chemical senses" — mere pain reactions — rather than tastes. Whether that is a meaningful distinction is in dispute.

For many years, books on the physiology of human taste contained diagrams of the tongue showing levels of sensitivity to different tastes in different regions. In fact, taste qualities are found in all areas of the tongue, in contrast with the popular view that different tastes map to different areas of the tongue. ^[1] ^[2] Physiology (in Greek physis = nature and logos = word) is the study of the mechanical, physical, and biochemical functions of living organisms. ...

Recent discoveries

In recent years, advances in chemistry and food research have led to suggestions of additional basic food flavours. The most well-known and generally accepted is the concept of a "fifth basic taste" called savoury, or "umami". Savoury is generally described as the taste of the common food flavouring monosodium glutamate, or MSG, first isolated by Dr. Kikunae Ikeda at the Imperial University of Tokyo, Japan, in 1907. Recently it has been discovered that the savoury taste is produced by interaction of NMDA and mGluR4 receptors [1]. Human taste sensory organs, called taste buds or gustatory calyculi, and concentrated on the upper surface of the tongue, appear to be receptive to relatively few chemical species as tastes. ... Chemical structure of monosodium glutamate Monosodium glutamate, sodium glutamate, flavour enhancer 621 EU food additive code: E621. ... NMDA (N-methyl-D-aspartic acid) is an amino acid derivative acting as a specific agonist at the NMDA receptor, and therefore mimics the action of the neurotransmitter glutamate on that receptor. ... Metabotropic glutamate receptors, or mGluRs, are a type of glutamate receptor which are active through an indirect metabotropic process. ...

In November 2005, it was reported that a team of French researchers experimenting on rodents claimed to have evidence for a sixth taste, for fatty substances. It is speculated that humans may also have the same receptors. Fat has occasionally been raised as a possible basic taste since at least the 1800s.

Some Japanese researchers refer to a flavour called kokumi which has been described variously as continuity, "mouthfulness", and thickness.

Main five basic tastes

Saltiness

Saltiness is a taste produced by the presence of sodium chloride (and to a lesser degree other salts). The ions of salt, especially sodium (Na⁺), can pass directly through ion channels in the tongue, leading to an action potential. Sodium chloride, also known as common salt, table salt, or halite, is a chemical compound with the formula NaCl. ... A magnified crystal of a salt (halite/sodium chloride) A salt, in chemistry, is any ionic compound composed of cations (positively charged ions) and anions (negative ions) so that the product is neutral (without a net charge). ... A. A schematic view of an idealized action potential illustrates its various phases as the action potential passes a point on a cell membrane. ...

Sourness

Sourness is the taste that detects acids. The mechanism for detecting sour taste is similar to that which detects salt taste. Hydrogen ion channels detect the concentration of hydronium ions (H₃O⁺ ions) that have dissociated from an acid. For other uses, see Acid (disambiguation). ... Ion channels are present in the membranes that surround all biological cells. ...

Hydrogen ions are capable of permeating the amiloride-sensitive sodium channels, but this is not the only mechanism involved in detecting the quality of sourness. Hydrogen ions also inhibit the potassium channel, which normally functions to hyperpolarize the cell. Thus, by a combination of direct intake of hydrogen ions (which itself depolarizes the cell) and the inhibition of the hyperpolarizing channel, sourness causes the taste cell to fire in this specific manner.

Sweetness

Sweetness is produced by the presence of sugars, some proteins and a few other substances. Sweetness is often connected to aldehydes and ketones which contain carbonyl group. Sweetness is detected by a variety of G protein coupled receptors coupled to the G protein gustducin found on the taste buds. At least two different variants of the "sweetness receptors" need to be activated for the brain to register sweetness. The compounds which the brain senses as sweet are thus compounds that can bind with varying bond strength to several different sweetness receptors. The differences between the different sweetness receptors is mainly in the binding site of the G protein coupled receptors. Sweetness is one of the five basic tastes, and is almost universally regarded as a pleasurable experience. ... Magnification of typical sugar In non-scientific use, the term sugar means sucrose, also called table sugar or saccharose, a white crystalline solid disaccharide. ... An aldehyde. ... Ketone group A ketone is either the functional group characterized by a carbonyl group linked to two other carbon atoms or a chemical compound that contains this functional group. ... In chemistry, a carbonyl group is a functional group composed of an atom of carbon double-bonded to an atom of oxygen. ... In cell biology, G-protein-coupled receptors, also known as GPCR, seven transmembrane receptors, heptahelical receptors, or 7TM receptors, are a class of transmembrane receptors. ... G-proteins, short for guanine nucleotide binding proteins, are a family of proteins involved in second messenger cascades. ... Taste buds are small structures on the upper surface of the tongue, soft palate, and epiglottis that provide information about the taste of food being eaten. ...

The average human detection threshold for sucrose is 10 millimoles per litre. For lactose it is 30 millimoles per liter, and 5-Nitro-2-propoxyaniline 0.002 millimoles per litre. Sucrose (common name: table sugar, also called saccharose) is a disaccharide (glucose + fructose) with the molecular formula C12H22O11. ... Lactose is a disaccharide that consists of Î²-D-galactose and Î²-D-glucose molecules bonded through a Î²1-4 glycosidic linkage. ... 5-Nitro-2-propoxyaniline, also known as P-4000 and and UltrasÃ¼ss, is one of the strongest sweet-tasting substances known, about 4,000 times the intensity of sucrose. ...

Miraculin is a glycoprotein extracted from the miracle fruit plant, a shrub native to west Africa (Richardella dulcifica). ...

Bitterness

Bitterness is the taste which detects bases. Bitterness, like sweetness, is sensed by G protein coupled receptors coupled to the G protein gustducin. Many people find bitter tastes to be unpleasant; many alkaloids taste bitter, and evolutionary biologists have suggested that a distaste for bitter things evolved because it enabled people to avoid accidental poisoning. A bases in chemistry is a chemical substance which has a free pair of electrons to bind a Hydrogen ion commonly referred to as a proton (IUPAC definition). ... In cell biology, G-protein-coupled receptors, also known as GPCR, seven transmembrane receptors, heptahelical receptors, or 7TM receptors, are a class of transmembrane receptors. ... G-proteins, short for guanine nucleotide binding proteins, are a family of proteins involved in second messenger cascades. ... Diagram of Ephedrine An alkaloid is a nitrogenous organic molecule that has a pharmacological effect on humans and animals. ... Evolutionary biology is a subfield of biology concerned with the origin and descent of species, as well as their change, multiplication, and diversity over time. ... For biological toxicity, see toxin and poison. ...

The bitterest substance known is the synthetic chemical denatonium, marketed as the trademarked Bitrex [2], discovered in 1958. Denatonium benzoate is a white, odourless solid used as an aversive agent, and can be an additive that prevents accidental ingestion of a toxic substance by humans, particularly children, and by animals. It is commonly used on denaturizing ethanol. Denatonium, usually available as denatonium benzoate (or under the trade names such as Bitrex or Aversion) and as denatonium saccharide, is the bitterest compound known. ... 1958 (MCMLVIII) was a common year starting on Wednesday of the Gregorian calendar. ... Ethanol, also known as ethyl alcohol or grain alcohol, is a flammable, colorless, mildly toxic chemical compound with a distinctive perfume-like odor, and is the alcohol found in alcoholic beverages. ...

The synthetic substance phenylthiocarbamide (PTC) tastes very bitter to most people, but is virtually tasteless to others; furthermore, among the tasters, some are so-called "supertasters" to whom PTC is extremely bitter. This genetic variation in the ability to taste a substance has been a source of great interest to those who study genetics. In addition, it is of interest to those who study evolution since PTC-tasting is associated with the ability to taste numerous natural bitter compounds, a large number of which are known to be toxic. Phenylthiocarbamide, also known as PTC, or phenylthiourea, is a synthetic organic molecule. ... A supertaster is a person who has an unusually strong sense of taste due to extra taste buds. ... Genetics (from the Greek genno Î³ÎµÎ½Î½ÏŽ= give birth) is the science of genes, heredity, and the variation of organisms. ... In 1832, while travelling on the Beagle, naturalist Charles Darwin collected giant fossils in South America. ...

Quinine, the anti-malarial prophylactic, is also known for its bitter taste and is found in tonic water. Quinine is a natural white crystalline alkaloid having antipyretic, anti-malarial with analgesic and anti-inflammatory properties and a bitter taste. ... This page is a candidate to be moved to Wiktionary. ... The Canada Dry brand of tonic water, shown on the right under ultraviolet light. ...

Bitter taste receptors are known specifically as T2R's (taste receptors, type 2). They are identified not only by their ability to taste for certain "bitter" ligands, but also by the morphology of the receptor itself (surface bound, monomeric)^[3].

Savouriness

Savouriness is the name for the taste sensation produced by the free glutamates commonly found in fermented and aged foods. In English, it is sometimes described as "meaty" or "savoury". In the Japanese, the term umami (旨味, うまみ) is used for this taste sensation, whose characters literally mean "delicious flavour." Umami is now the commonly used term by taste scientists. The same taste is referred to as xiānwèi (鮮味 or 鲜味) in Chinese cooking. Savoury is considered a fundamental taste in Japanese and Chinese cooking, but is not discussed as much in Western cuisine. Human taste sensory organs, called taste buds or gustatory calyculi, and concentrated on the upper surface of the tongue, appear to be receptive to relatively few chemical species as tastes. ... Glutamate is the anion of glutamic acid. ... Western cuisine is a term used for cuisine in The Americas and in Europe. ...

Examples of food containing these free glutamates (and thus strong in the savoury taste) are parmesan and roquefort cheese as well as soy sauce and fish sauce. It is also found in significant amounts in various unfermented foods such as walnuts, grapes, broccoli, tomatoes, and mushrooms, and to a lesser degree in meat. The glutamate taste sensation is most intense in combination with sodium. This is one reason why tomatoes exhibit a stronger taste after adding salt. Sauces with savoury and salty tastes are very popular for cooking, such as tomato sauces and ketchup for Western cuisines and soy sauce and fish sauce for East Asian and Southeast Asian cuisines. Since not every glutamate produces a savoury-like taste sensation, there is continuing investigation into the exact mechanism of how the savoury taste sensation is produced. Parmesan cheese. ... Roquefort can have one of several meanings: Roquefort cheese Roquefort, the mouse in Disneys The Aristocats Roquefort is the name or part of the name of several communes in France: Roquefort, in the Gers département Roquefort, in the Landes département Roquefort, in the Lot-et-Garonne d... Cheese is a solid food made from the milk of cows, goats, sheep, and other mammals. ... Soy sauce (US) or soya sauce is a fermented sauce made from soybeans (soya beans), roasted grain, water and salt. ... Fish sauce is a condiment derived from fish that have been allowed to ferment. ... Species See text The walnuts (genus Juglans) are plants in the walnut family Juglandaceae. ... Species Vitis acerifolia Vitis aestivalis Vitis amurensis Vitis arizonica Vitis x bourquina Vitis californica Vitis x champinii Vitis cinerea Vitis x doaniana Vitis girdiana Vitis labrusca Vitis x labruscana Vitis lincecumii Vitis monticola Vitis mustangensis Vitis x novae-angliae Vitis palmata Vitis riparia Vitis rotundifolia Vitis rupestris Vitis shuttleworthii Vitis... Broccoli is a plant of the Cabbage family, Brassicaceae (formerly Cruciferae). ... Look up Tomato in Wiktionary, the free dictionary. ... The relative sizes of the Cap (pileus) and Stalk (stipe) vary widely. ... Various meats Cold Meat Salad Meat, in its broadest definition, is animal tissue used as food. ... General Name, Symbol, Number sodium, Na, 11 Chemical series alkali metals Group, Period, Block 1, 3, s Appearance silvery white Atomic mass 22. ... A magnified crystal of a salt (halite/sodium chloride) A salt, in chemistry, is any ionic compound composed of cations (positively charged ions) and anions (negative ions) so that the product is neutral (without a net charge). ... A bottle of Heinz Organic Ketchup Ketchup (or less commonly catsup) is a popular condiment, usually made with ripened tomatoes. ... East Asia is a subregion of Asia that can be defined in either geographical or cultural terms. ... Location of Southeast Asia Southeast Asia is a subregion of Asia. ...

The additive monosodium glutamate (MSG), which was developed as a food additive in 1907 by Kikunae Ikeda, produces a strong savoury taste. Savoury is also provided by the nucleotides disodium 5’-inosine monophosphate (IMP) and disodium 5’-guanosine monophosphate (GMP). These are naturally present in many protein-rich foods. IMP is present in high concentrations in many foods, including dried skipjack tuna flakes used to make dashi, a Japanese broth. GMP is present in high concentration in dried shiitake mushrooms, used in much of the cuisine of Asia. There is a synergistic effect between MSG, IMP and GMP which together in certain ratios produce a strong umami taste. Chemical structure of monosodium glutamate Monosodium glutamate, sodium glutamate, flavour enhancer 621 EU food additive code: E621. ... 1907 (MCMVII) was a common year starting on Tuesday (see link for calendar) of the Gregorian calendar (or a common year starting on Wednesday of the 13-day-slower Julian calendar). ... Kikunae Ikeda (池田 菊苗 Ikeda Kikunae, October 8, 1864 – May 3, 1936) was a Tokyo Imperial University professor who discovered the umami flavor. ... A nucleotide is a chemical compound that consists of a heterocyclic base, a sugar, and one or more phosphate groups. ... Disodium inosinate (E631) is a food additive often found in instant noodles, potato chips, and a variety of other snacks. ... Binomial name Katsuwonus pelamis (Linnaeus, 1758) The skipjack tuna, Katsuwonus pelamis, is a medium-sized perciform fish in the tuna family, Scombridae. ... Dashi (å‡ºæ±) is one of several simple soup stocks considered fundamental to Japanese cooking. ... Binomial name Lentinula edodes (Berk. ... Asian cuisine is a term for the various cuisines of East Asia and for fusion dishes based on combining them. ...

A subset of savoury taste buds responds specifically to glutamate in the same way that sweet ones respond to sugar. Glutamate binds to a variant of G protein coupled glutamate receptors ^[4]. Glutamate is the anion of glutamic acid. ... In cell biology, G-protein-coupled receptors, also known as GPCR, seven transmembrane receptors, heptahelical receptors, or 7TM receptors, are a class of transmembrane receptors. ...

Other sensations

The tongue can also feel other sensations, not generally called tastes per se or included in the five human tastes. These are largely detected by the somatosensory system. This page includes English translations of several Latin phrases and abbreviations such as . ... The somatosensory system is the sensory system of somatic sensation. ...

Temperature

Temperature is an essential element of human taste experience. Food and drink which — within a given culture — is considered to be properly served hot is often considered distasteful if cold, and vice versa.

Some sugar substitutes have strong heats of solution, as is the case of sorbitol, erythritol, xylitol, mannitol, lactitol and maltitol. When they are dry and are allowed to dissolve in saliva, besides the sweet taste also heat effects can be recognized. The cooling effect upon eating may be desirable, as in a mint candy made with crystalline sorbitol, or undesirable if it's not typical for that product, like in a cookie. Crystalline phases tend to have a positive heat of solution and thus a cooling effect. The heats of solution of the amorphous phases of the same substances are negative and cause a warm impression in the mouth. ^[5] The enthalpy change of solution is the quantity of heat produced or absorbed when a one mole of a substance is dissolved in a large volume of a solvent at constant pressure. ... Sorbitol, also known as glucitol, is a sugar alcohol the body metabolises slowly. ... Erythritol is a sugar alcohol which has been approved for use in the United States as a food additive and sweetener. ... Xylitol, also called wood sugar or birch sugar, is a five-carbon sugar alcohol that is used as a sugar substitute. ... Mannitol or hexan-1,2,3,4,5,6-hexol (C6H8(OH)6) is an osmotic diuretic agent and a weak renal vasodilator. ... Lactitol is a sugar alcohol used as a replacement sweetener for low calorie foods with approximately 40% of the sweetness of sugar. ... Maltitol is a sugar alcohol (polyol) used as a sugar substitute. ... Crystal (disambiguation) Insulin crystals A crystal is a solid in which the constituent atoms, molecules, or ions are packed in a regularly ordered, repeating pattern extending in all three spatial dimensions. ... An amorphous solid is a solid in which there is no long-range order of the positions of the atoms. ...

(False) coolness

Some substances activate cold trigeminal receptors. One can sense a cool sensation (also known as "cold", "fresh" or "minty") from, e.g., spearmint, menthol, ethanol or camphor, which is caused by the food activating the TRP-M8 ion channel on nerve cells that signal cold. The reactions behind this sense are therefore analogous to those behind the hot sense. Unlike the actual change in temperature described for sugar substitutes, coolness is only a perceived phenomena. Binomial name Mentha spicata Crantz Spearmint (Mentha spicata, syn ) is a species of mint native to central and southern Europe, where it grows in wet soils. ... Menthol is a covalent organic compound made synthetically or obtained from peppermint or other mint oils. ... Ethanol, also known as ethyl alcohol or grain alcohol, is a flammable, colorless, mildly toxic chemical compound with a distinctive perfume-like odor, and is the alcohol found in alcoholic beverages. ... R-phrases 11-20/21/22-36/37/38 S-phrases 16-26-36 RTECS number EX1260000 (R) EX1250000 (S) Supplementary data page Structure and properties n, Îµr, etc. ... There is a real need to make clear to what transient refers in a transient receptor potential, and the advice of the wider community is solicited to fill this need. ...

Spiciness or (false) heat

Substances such as ethanol and capsaicin cause a burning sensation by inducing a trigeminal nerve reaction together with normal taste reception. The heat is caused by the food activating a nerve cell ion channel called TRP-V1, which is also activated by hot temperatures. The sensation, usually referred to as "hot" or "spicy", is a notable feature of Mexican, Indian, Tex-Mex, Szechuan, Korean, and Thai cuisine. The Scoville scale is a measure of the hotness of a chilli pepper. ... Ethanol, also known as ethyl alcohol or grain alcohol, is a flammable, colorless, mildly toxic chemical compound with a distinctive perfume-like odor, and is the alcohol found in alcoholic beverages. ... The chemical compound capsaicin (8-methyl-N-vanillyl-6-nonenamide) is the active component of chile peppers (Capsicum). ... The trigeminal nerve is the fifth (V) cranial nerve, and carries sensory information from most of the face, as well as motor supply to the muscles of mastication (the muscles enabling chewing), tensor tympani (in the middle ear), and other muscles in the floor of the mouth, such as the... Drawing by Santiago RamÃ³n y Cajal of neurons in the pigeon cerebellum. ... 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. ... There is a real need to make clear to what transient refers in a transient receptor potential, and the advice of the wider community is solicited to fill this need. ... Tex-Mex is a highly spiced and vibrant style of cooking that developed as an evolution of Northern Mexican cuisine in Texas, USA. The name is derived from the names Texas and Mexico. ... Szechuan cuisine is a style of cookery originating in the Sichuan province of western China which has an international reputation for being spicy and flavorful. ... Thai seafood curry Thai cuisine is known for its blend of fundamental flavors in each dish -- hot (spicy), sour, sweet, salty and bitter. ...

The two main plants providing this sensation are chili peppers (those fruits of the Capsicum plant that contain capsaicin) and black pepper. The chili pepper, chile pepper, or chilli pepper, or simply chilli, chili or chile, is the fruit of the plant Capsicum from the nightshade family, Solanaceae. ... Species C. annuum (incl. ... Binomial name Piper nigrum L. Black pepper (Piper nigrum) is a flowering vine in the family Piperaceae, cultivated for its fruit, which is usually dried and used as a spice and seasoning. ...

Due to a lack of a specific word for this flavour ("hot" properly refers to temperature; "spicy", to any spice) in English, the French term piquant is occasionally used. The term pungent is also used for this, especially among people of Anglo-Indian ethnicity. Indeed, many languages have a specific term, e.g. Spanish picante, Dutch pikant, Danish stærk, Finnish tulinen, German scharf, Chinese 辣 (là), Swedish stark, and Thai เผ็ด (ped). Screen shot of Spice OPUS, a fork of Berkeley SPICE SPICE (Simulation Program with Integrated Circuits Emphasis) is a general purpose analog circuit simulator. ... Anglo-Indians are persons who have descended from a mix of British and Indian parentage. ...

Astringency

Some foods, such as tea or unripe fruits, contain tannins that constrict organic tissue. The best example of this is unripe persimmons, whose juice causes a very unpleasant astringent sensation on any part of the mouth it touches. Tannins are astringent, bitter-tasting plant polyphenols that bind and precipitate proteins. ... Species (kaki persimmon) (black sapote) (velvet apple) (date plum) (Texas persimmon) (American persimmon) Persimmon most commonly refers to the edible fruit borne by some species of the genus Diospyros. ...

Less exact terms for the astringent sensation include: "hard", "styptic", "dry", "rough", "harsh" (especially for wine) and "tart" (normally referring to sourness). The Chinese have a term for this: 澀 (ser) while Thai have ฝาด (fard).

Fat

Recent research has revealed a potential taste receptor called the CD36 receptor to be reacting to fat, more specifically, fatty acids. [3] This receptor was found in mice, but probably exists among other mammals as well. In experiments, mice with a genetic defect that blocked this receptor didn't show the same urge to consume fatty acids as normal mice, and failed to prepare gastric juices in their digestive tracts to digest fat. This discovery may lead to a better understanding of the biochemical reasons behind this behaviour, although more research is still necessary to confirm the relationship of CD36 and the cravings of fat. CD36 CD36 (GP88) is an 88-kDa cell surface single polypeptide chain glycoprotein, preferentially located within lipid rafts, which is found on platelets, erythrocytes, monocytes, differentiated adipocytes, mammary epithelial cells, liver and spleen cells and some skin microdermal endothelial cells. ... For other uses, see Fat (disambiguation). ... Binomial name Rattus norvegicus (Berkenhout, 1769) The brown rat, common rat, Norway rat, Norwegian rat or wharf rat (Rattus norvegicus) is one of the best-known and common rats, and also one of the largest. ... Orders Multituberculata (extinct) Palaeoryctoides (extinct) Triconodonta (extinct) Subclass Australosphenida Ausktribosphenida Monotremata Subclass Eutheria (excludes extinct ancestors) Afrosoricida Anagaloidea (extinct) Arctostylopida (extinct) Artiodactyla Carnivora Cetacea Chiroptera Cimolesta (extinct) Cingulata Creodonta (extinct) Condylarthra (extinct) Dermoptera Desmostylia (extinct) Dinocerata (extinct) Embrithopoda (extinct) Hyracoidea Insectivora Lagomorpha Leptictida (extinct) Litopterna (extinct) Macroscelidea Mesonychia (extinct) Notoungulata... Gastric juice is a strong acidic liquid, pH 1 to 3, which is close to being colourless. ... The gastrointestinal tract or digestive tract, also referred to as the GI tract or the alimentary canal, (nourishment canal) or the gut, is the system of organs within multicellular animals which takes in food, digests it to extract energy and nutrients, and expels the remaining waste. ...

Tingly numbness

Chinese cooking includes the idea of 麻 má, the sensation of tingling numbness caused by spices such as Sichuan pepper. The cuisine of Sichuan province often combines this with chilli to produce a 麻辣 málà, "numbing-and-hot", flavour. [4] Sichuan pepper (or Szechuan pepper) is the outer pod of the tiny fruit of a number of species in the genus Zanthoxylum (most commonly Zanthoxylum piperitum, Zanthoxylum simulans, and Zanthoxylum sancho), widely grown and consumed in Asia as a spice. ... (Chinese: å››å·; Pinyin: ; Wade-Giles: Ssu-ch`uan; Postal Pinyin: Szechwan and Szechuan) is a province in central-western China with its capital at Chengdu. ...

References

August 28 is the 240th day of the year in the Gregorian Calendar (241st in leap years), with 125 days remaining. ... 2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... 1909 (MCMIX) was a common year starting on Friday (see link for calendar). ... For album titles with the same name, see 2002 (album). ... The Financial Times (FT) is an international business newspaper printed on distinctive salmon pink broadsheet paper. ... August 6 is the 218th day of the year in the Gregorian Calendar (219th in leap years), with 147 days remaining. ... 2005 (MMV) was a common year starting on Saturday of the Gregorian calendar. ...

External links

Categories: Articles with unsourced statements | Gustatory system This article or section may be confusing for some readers, and should be edited to be clearer or more simplified. ... The gustatory system is the sensory system that uses taste buds (or lingual papillae) on the upper surface of the tongue to provide information about the taste of food being eaten. ... A human tongue The tongue is the large bundle of skeletal muscles on the floor of the mouth that manipulates food for chewing and swallowing, (deglutition). ... Taste buds are small structures on the upper surface of the tongue, soft palate, and epiglottis that provide information about the taste of food being eaten. ...

Contents

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