The muscle that opposes a particular action is called the
A) agonist. B) synergist. C) prime mover. D) antagonist.
D
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Bicarbonate (HCO3-) is a
?A. strong proton donor.?B. strong proton acceptor.?C. weak proton donor.?D. weak proton acceptor.
The prefix a- means _____.?
A) ?process of B) ?without C) ?excessive
In a sample of distilled water, a water molecule that has picked up an extra hydrogen ion is called a(n)
A. proteinaceous water molecule. B. hydronium ion. C. hydroxide ion. D. amphipathic macromolecule.
Considering the following events in the nuclear receptor model, identify which of these events occurs in the nucleus.(1) Hormone receptor complex binds to DNA.(2) Messenger RNA directs synthesis of specific proteins.(3) Hormone binds to receptors in the nucleus (sometimes in the cytoplasm).(4) Messenger RNA synthesis is activated.(5) Synthesized proteins produce the response of the cell.
A. 1, 2, 3 B. 3, 4, 5 C. 1, 3, 4 D. 1, 3, 5 E. All events occur in the nucleus.