| gag reflex | Contact of a foreign body with the mucous membrane of the fauces causes retching or gagging. Synonym: faucial reflex. (05 Mar 2000) |
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| gag | 1. To retch; to cause to retch or heave. 2. To prevent from talking. 3. An instrument adjusted between the teeth to keep the mouth from closing during operations in the mouth or throat. (05 Mar 2000) |
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| gag protein | <molecular biology> The protein of the nucleocapsid shell around the RNA of a retrovirus. (18 Nov 1997) |
| gene products, gag | Proteins coded by the retroviral gag gene. The products are usually synthesised as protein precursors or polyproteins, which are then cleaved by viral proteases to yield the final products. Many of the final products are associated with the nucleoprotein core of the virion. Gag is short for group-specific antigen. (12 Dec 1998) |
| genes, gag | DNA sequences that form the coding region for proteins associated with the viral core in retroviruses. Gag is short for group-specific antigen. (12 Dec 1998) |
| Davis-Crowe mouth gag | Instrument used for opening the mouth, depressing the tongue, maintaining the airway, and transmitting volatile anaesthetics during tonsillectomy or oropharyngeal surgery. (05 Mar 2000) |
| oncogene protein p65(gag-jun) | Transforming protein coded by jun oncogenes (genes, jun). This is a gag-onc fusion protein of about 65 kD derived from avian sarcoma virus. V-jun lacks a negative regulatory domain that regulates transcription in c-jun. (12 Dec 1998) |
| fusion proteins, gag-onc | General name for the translation products of a fusion mRNA consisting of a gag gene and a viral oncogene (v-onc). These products are thought to have the ability to transform cells. (12 Dec 1998) |
| fusion proteins, gag-pol | Polyprotein products of a fused portion of retroviral mRNA containing the gag and pol genes. The polyprotein is synthesised only five percent of the time since pol is out of frame with gag, and is generated by ribosomal frameshifting. (12 Dec 1998) |
| abdominocardiac reflex | Mechanical stimulation (usually distention) of abdominal viscera causing changes (usually a slowing) in the heart rate or the occurrence of extrasystoles. (05 Mar 2000) |
| Abrams' heart reflex | A contraction of the myocardium when the skin of the precordial region is irritated. (05 Mar 2000) |
| accommodation reflex | Increased convexity of the lens, due to contraction of the ciliary muscle and relaxation of the suspensory ligament, to maintain a distinct retinal image. (05 Mar 2000) |
| Achilles reflex | A contraction of the calf muscles when the tendo calcaneus is sharply struck. Synonym: ankle jerk, ankle reflex, tendo Achillis reflex, triceps surae reflex. (05 Mar 2000) |
| acousticopalpebral reflex | A form of the wink reflex in which there is a contraction, sometimes very slight, of the orbicularis palpebrarum muscle when a sudden noise is made close to the ear; it is absent in labyrinthine disease with total deafness. Synonym: acousticopalpebral reflex, auropalpebral reflex, cochleo-orbicular reflex, startle reflex. (05 Mar 2000) |
| acquired reflex | A reflex that is gradually developed by training and association through the frequent repetition of a definite stimulus. See: conditioning. Synonym: acquired reflex, behaviour reflex, trained reflex. (05 Mar 2000) |
| acromial reflex | Contraction of the biceps muscle caused by a tap on the acromion or the coracoid process. (05 Mar 2000) |