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abnormal red blood cell that has thorny projections of protoplasm acanthocyte
breakdown of a cell layer in the epidermis (as in pemphigus) acantholysis
abnormal but benign thickening of the prickle-cell layer of the skin (as in psoriasis) acanthosis
cell without a nucleus (as an erythrocyte) acaryote , akaryocyte , akaryote
RNA molecules present in the cell (in at least 20 varieties, each variety capable of combining with a specific amino acid) that attach the correct amino acid to the protein chain that is being synthesized at the ribosome of the cell (according to directio acceptor RNA , soluble RNA , transfer RNA , tRNA
part of a cell nucleus that is relatively uncolored by stains or dyes achromatin
process at the anterior end of a sperm cell that produces enzymes to facilitate penetration of the egg acrosome
local voltage change across the cell wall as a nerve impulse is transmitted action potential
transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient; requires an expenditure of energy active transport
asexual reproductive cell agamete
(biochemistry) a drug that can combine with a receptor on a cell to produce a physiological reaction agonist
Islamic terrorist cell that originated in Jordan but operates in Germany; goal is to attack Europe and Russia with chemical weapons al-Tawhid , Al Tawhid , Divine Unity
receptors postulated to exist on nerve cell membranes of the sympathetic nervous system in order to explain the specificity of certain agents that affect only some sympathetic activities (such as vasoconstriction and relaxation of intestinal muscles and c alpha-adrenergic receptor , alpha-adrenoceptor , alpha receptor
cell from which tooth enamel develops ameloblast
direct method of cell division characterized by simple division of the nucleus without formation of chromosomes amitosis
(genetics) an organism or cell having a diploid set of chromosomes from each parent amphidiploid
loss of structural differentiation within a cell or group of cells often with increased capacity for multiplication, as in a malignant tumor anaplasia
negatively charged terminal of a voltaic cell or storage battery that supplies current anode
type of cell death in which the cell uses specialized cellular machinery to kill itself; a cell suicide mechanism that enables metazoans to control cell number and eliminate cells that threaten the animal's survival apoptosis , caspase-mediated cell death , programmed cell death
(biology) growth in the thickness of a cell wall by the deposit of successive layers of material apposition
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