Which type of neural circuit allows one motor neuron in the brain to cause thousands of muscle fibers to contract?
A. Diverging
B. Converging
C. Parallel after-discharge
D. Recruitment
E. Long-term potentiation
A. Diverging
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Acetylcholine will cause the pupil of the eye to constrict. A drug acts on receptors for acetylcholine to cause the pupils of the eye to dilate. Nicotine does not bind to receptors in smooth muscle cells of the iris. Therefore, the drug which causes the pupils to dilate is a ________.
A. an adrenergic agent B. a muscarinic agent C. muscarinic blocking agent D. a nicotinic agent E. nicotinic blocking agent
A base is a proton ________.
A. acceptor B. converter C. creator D. donor E. Both acceptor and creator are correct.
The radiologist informs Matthew that his fracture has not penetrated the skin, meaning Matthew has a/an ________ fracture.
A. irregular B. displaced C. composite D. closed E. open
If the ATP-generating mechanisms in a cell are poisoned and the cell depletes its ATP reserves, which would occur first?
A. Primary active transport of molecules would cease. B. Secondary active transport of molecules would cease. C. Facilitated diffusion of molecules would cease. D. Ion concentration gradients would reach equilibrium across the cell membrane. E. All transport processes would cease immediately when the ATP was depleted.