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| Explanation of immune system (noun) form plural: immune systems the organs and cells that provide defense against tissue invasion or damage Sample of immune system The immune system includes the skin, membranes and immune cells e.g. the white blood cells.
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| Explanation of cimetidine (noun) generic name for drugs that used to treat peptic ulcers by decreasing the secretion of stomach acid; brand name: Tagamet Sample of cimetidine Cimetidine was the first H2 blocker to reach the clinic, which was a triumph for synthetic organic chemistry.
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| Explanation of insomniac (noun) form plural: insomniacs person who is unable to sleep Sample of insomniac Insomniacs may ask for tranquilizers to help them sleep.
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| Explanation of biological clock (noun) form: no plural system that controls daily cycles such as blood pressure, sleep rhythms and hormone release Sample of biological clock The pineal gland helps control the biological clock.
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| Explanation of mitosis (noun) form: no plural cellular division producing somatic cells with a full quota of chromosomes after each division Sample of mitosis Identical daughter cells are formed after a cell divides by mitosis.
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| Explanation of competitive inhibition (noun) form plural: competitive inhibitions interference of enzyme action by an abnormal substrate that blocks the normal substrate entering the active site Sample of competitive inhibition Competitive inhibition is a form of reversible enzyme inhibition. The scale of the amine abnormality is proportional to the degree of hyperphenylalaninaemia and probably depends on the combined effects of competitive inhibition of tyrosine and tryptophan hydroxylases (by phenylalanine) and a deficiency of the amino acid substrates for these enzymes.
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| Explanation of acyl chloride (noun) form plural: acyl chlorides this is made when the hydroxyl group of a carboxylic acid is replaced by a chlorine atom Sample of acyl chloride Acyl chlorides are highly reactive.
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| Explanation of epigastrium (noun) form: no plural upper abdomen between the ribcage and navel Sample of epigastrium The esophagus lies in the epigastrium.
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| Explanation of position (noun) form plural: positions stance Sample of position These results lend strong support to a catalytic mechanism in which an enzyme sulfhydryl group undergoes Michael addition to the C-5-C-6 double bond, thus activating position C-5 of the substrate DNA cytosine residue for electrophilic attack by the methyl donor SAM.
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| Explanation of bromide (noun) form plural: bromides a compound made of bromine joined to another element Sample of bromide Potassium bromide is an example of a bromide. Australian scientists have suggested that carbonyl sulphide should be used as a benign alternative to methyl bromide, a pesticide employed for fumigating soil, timbers, and grains and fruit after harvest.
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