What is the purpose of motor nerve varicosities as they relate to smooth muscle?
A. They link the thin myofilaments to the inside of the sarcolemma in smooth muscle.
B. They release neurotransmitter onto smooth muscle cells.
C. They prevent unitary smooth muscle cells from pulling apart.
D. They reabsorb the decomposition products of acetylcholine after acetylcholinesterase breaks it down.
E. They enable each cardiomyocyte to directly stimulate its neighbors.
Answer: B
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Respiratory alkalosis can be
A) characterized by muscle paralysis. B) compensated for by a decreased respiratory rate. C) compensated for by a decreased secretion of bases in the kidneys. D) caused by anything that decreases breathing rate.
Of the respiratory air volumes listed, which one has the largest volume?
A. Vital capacity B. Expiratory reserve volume C. Inspiratory reserve volume D. Tidal volume
Which of the following would increase GnRH levels?
A. Increased FSH B. Decreased estrogen C. Increased progesterone D. Increased hCG E. Increased inhibin
During the fasting state, the energy stores of the ________ become the major source of glucose for the whole body.
A) brain B) liver C) adipose tissues D) pancreas E) muscles