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chemoreceptorenUK
che·mo·re·cep·tor C0272400 (kē′mō-rĭ-sĕp′tər, kĕm′ō-)n. A sensory nerve cell or sense organ, as of smell or taste, that responds to chemical stimuli.chemoreceptor (ˌkɛməʊrɪˈsɛptə) or chemoceptorn (Physiology) a sensory receptor in a biological cell membrane to which an external molecule binds to generate a smell or taste sensationche•mo•re•cep•tor (ˌki moʊ rɪˈsɛp tər, ˌkɛm oʊ-)
n. a receptor stimulated by chemical means. [1905–10] chemoreceptorA sensory organ that responds to a chemical stimulus. Chemoreceptors give us our senses of taste and smell.Thesaurus| Noun | 1. | chemoreceptor - a sensory receptor that responds to chemical stimulisense organ, sensory receptor, receptor - an organ having nerve endings (in the skin or viscera or eye or ear or nose or mouth) that respond to stimulationgustatory organ, taste bud, tastebud - an oval sensory end organ on the surface of the tonguecarotid body - a chemoreceptor located near the bifurcations of the carotid arteries; monitors oxygen content of the blood and helps control respirationnose, olfactory organ - the organ of smell and entrance to the respiratory tract; the prominent part of the face of man or other mammals; "he has a cold in the nose" |
TranslationsChemoreceptorenUK
chemoreceptor[‚kē·mō·ri′sep·tər] (physiology) Any sense organ that responds to chemical stimuli. Chemoreceptor a specialized sensory cell or cellular structure, for example, a nerve ending, by which animals and humans perceive chemical stimuli, including metabolic changes. The effect of chemical agents on the receptors, like that of other stimuli on the corresponding receptor cells, gives rise to bioelectric potentials in the chemoreceptors and related nerve cells. Some chemoreceptors are highly selective, reacting only to a single substance or to a small group of substances; examples are the chemoreceptors in insects that are sensitive to pheromenes or receptors that react to carbon dioxide. External (sensory) chemoreceptors signal fluctuations in the pH and ion composition of water and in the composition of atmospheric gases. They also indicate the presence in the environment or oral cavity of nutrients, caustic or toxic substances, and special chemical signals exchanged between living organisms. Internal chemoreceptors, which are a type of interoceptor, are sensitive to the chemical constituents of blood and other internal fluids. From the evolutionary standpoint, chemoreceptors are probably the most ancient receptor formations. The sensory chemoreceptors of vertebrates include the olfactory and gustatory cells situated in the organs of smell and taste, as well as the free nerve endings in the skin that perform the function of “general chemical sensation.” Olfactory and gustatory chemoreceptors are also distinguished on the basis of functional and morphological characteristics in some invertebrates, for example, insects. However, this distinction cannot always be made in the case of invertebrates, especially aquatic forms. In molecular biology, the term “chemoreceptor” is also used to designate a subcellular formation, that is, a specialized macromolecular structure arranged on the external surface of the cell membrane, that interacts with the molecules of chemical stimuli. The term is also used to designate similar receptors in protozoans. A. V. MINOR chemoreceptorenUK
chemoreceptor [ke″mo-re-sep´ter] any of the special cells or organs adapted for excitation by chemical substances and located outside the central nervous system. The carotid and aortic bodies are chemoreceptors in the large arteries of the thorax and the neck; they are responsive to changes in the oxygen, carbon dioxide, and hydrogen ion concentrations in the blood. When oxygen concentration falls below normal in the arterial blood, they send impulses to stimulate the respiratory center so that there will be an increase in alveolar ventilation and thus an increase in the intake of oxygen by the lungs. Other chemoreceptors are the taste buds, which are sensitive to chemicals in the mouth, and the olfactory cells of the nose, which detect certain chemicals in the air.che·mo·re·cep·tor (kē'mō-rē-sep'tŏr), Any cell that when activated by a change in its chemical milieu produces a nerve impulse. Such cells can be either 1) "transducer" cells innervated by sensory nerve fibers (for example, the gustatory receptor cells of the taste buds or cells in the carotid body sensitive to changes in the oxygen and carbon dioxide content of the blood), or 2) nerve cells proper, such as the olfactory receptor cells of the olfactory mucosa, and certain cells in the brainstem that are sensitive to changes in the composition of the blood or cerebrospinal fluid. Synonym(s): chemoceptorchemoreceptor (kē′mō-rĭ-sĕp′tər, kĕm′ō-)n. A sensory nerve cell or sense organ, as of smell or taste, that responds to chemical stimuli.che·mo·re·cep·tor , chemoceptor (kē'mō-rĕ-sep'tŏr, kēmō-septŏr) Any cell that responds to a change in its chemical milieu with a nerve impulse. Such cells can be either "transducer" cells innervated by sensory nerve fibers (e.g., the gustatory cells of the taste buds) or nerve cells proper, such as the olfactory receptor cells of the olfactory mucosa. chemoreceptor a RECEPTOR that is stimulated by contact with molecules and is capable of reacting to and differentiating between different chemical stimuli. Chemoreceptors are found where external stimuli are being sampled, for example in the taste buds and in the mucous membranes of the nose. They are also found within the body, sampling the internal environment.che·mo·re·cep·tor , chemoceptor (kē'mō-rĕ-sep'tŏr, kēmō-septŏr) Any cell that responds to a change in its chemical milieu with a nerve impulse. chemoreceptorenUK
Related to chemoreceptor: mechanoreceptor, thermoreceptor, Chemoreceptor trigger zone, central chemoreceptorWords related to chemoreceptornoun a sensory receptor that responds to chemical stimuliRelated Words- sense organ
- sensory receptor
- receptor
- gustatory organ
- taste bud
- tastebud
- carotid body
- nose
- olfactory organ
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