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acetylcholine

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acetic acid

acetic acid  

(ă-see-tik)the acid that is present in vinegar. It is used in the preparation of astringent and antiseptic medicines and in urine testing. Formula: CH3COOH.
acetylcholinesterase

acetylcholinesterase  

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An enzyme that hydrolyses acetylcholine to acetic acid and choline. By destroying acetylcholine after its release from the terminal boutons of presynaptic neurons and from postsynaptic receptors ...
alimentary canal

alimentary canal  

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(ali-ment-er-i)the long passage, extending from the mouth to the anus, through which food passes to be digested and absorbed.The alimentary canal
Alzheimer's disease

Alzheimer's disease  

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The most common form of dementia, occurring in middle age or later. It is characterized by memory impairment and, as the disease progresses, language difficulties, apraxia, and visuospatial problems. ...
anticholinergic

anticholinergic  

Of or relating to any drug such as atropine or scopolamine that blocks nerve impulses in the parasympathetic nervous system or counteracts the effects of acetylcholine, such blocking also resulting ...
anticholinesterase

anticholinesterase  

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n. any substance that inhibits the action of cholinesterase, the enzyme that is responsible for the breakdown of the neurotransmitter acetylcholine, and therefore allows acetylcholine to continue ...
antimuscarinic

antimuscarinic  

(anti-musk-er-in-ik)inhibiting the action of acetylcholine, a neurotransmitter in the parasympathetic nervous system. Antimuscarinic drugs relax smooth muscle, decrease the secretion of saliva, ...
antiparkinsonian

antiparkinsonian  

(Of or relating to) any drug that alleviates parkinsonism or the pseudo-parkinsonian side-effects of neuroleptic drugs such as the phenothiazines. In particular, l-dopa or bromocriptine compensates ...
atropine

atropine  

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An alkaloid, isolated from deadly nightshade Atropa belladonna, that inhibits muscarinic acetylcholine receptors. If topically applied to the eye, causes dilation of the pupil, enhancing beauty; ...
autonomic nervous system

autonomic nervous system  

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That part of the nervous system that controls and regulates involuntary body functions (e.g. digestion, heart rate, and temperature regulation). It is divided up into the sympathetic and ...
biogenic amine

biogenic amine  

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Any amine that is produced by living organisms, especially the physiologically active amines that serve as neurotransmitters in animals. These include adrenaline (epinephrine), noradrenaline ...
cardiac glycosides

cardiac glycosides  

A generic term for a group of steroid glycosides that includes oubain and digitalis, which increase cardiac output. They act by stimulating systolic contraction of the heart muscle (see systole). ...
cell signalling

cell signalling  

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The interchange of information between cells, usually mediated by the release of soluble factors but sometines by contact or by exchange of small molecules or ions through gap junctions.
chemoreceptor

chemoreceptor  

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A receptor that detects the presence of particular chemicals and (in multicellular organisms) transmits this information to sensory nerves. Examples include the taste buds and the receptors in the ...
cholesterol

cholesterol  

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(kŏl-est-er-ol)a fatlike material (a sterol) present in the blood and most tissues, especially nervous tissue. Elevated blood concentration of cholesterol (hypercholesterolaemia) is often associated ...
choline

choline  

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n. a basic compound important in the synthesis of phosphatidylcholine (lecithin) and other phospholipids and of acetylcholine. It is also involved in the transport of fat in the body. Choline is ...
cholinergic

cholinergic  

Describing a nerve fibre that either releases acetylcholine when stimulated or is itself stimulated by acetylcholine. Compare adrenergic.
cholinesterase

cholinesterase  

An enzyme that hydrolyses the neurotransmitter acetylcholine to choline and acetate. Cholinesterase is secreted by nerve cells at synapses and by muscle cells at neuromuscular junctions. ...
cholinomimetic

cholinomimetic  

n. (Of or relating to) any substance, such as carbachol or methacholine, that mimics the action of acetylcholine in the nervous system. See also muscarine, nicotine. [From (acetyl)choline + Greek ...
convulsant

convulsant  

(Of or pertaining to) a drug such as picrotoxin, strychnine, or tetanus toxin that produces convulsions by blocking the inhibitory action of neurotransmitters such as GABA or acetylcholine in the ...

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