What by-product results during the production of nitric oxide?
A) citrulline
B) carbon dioxide
C) nitric oxide synthase
D) carbon monoxide
E) arginine
A) citrulline
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Which is not correct regarding the penis?
A. The penis is the male copulatory organ. B. The root of the penis is attached to the pubic arch. C. The prepuce is removed during circumcision. D. The enlarged proximal end is called the glans. E. The body of the penis contains the corpora cavernosa and corpus spongiosum.
Compared to blood capillaries, lymph capillaries exhibit all of the following except that they
A) have no basement membrane. B) have only a tunica interna. C) have walls of endothelial cells that overlap like shingles. D) are smaller in diameter. E) are frequently irregular in shape.
When muscles are not used, they shrink or
A. fatigue. B. atrophy. C. antagonize. D. hypertrophy.
Smooth muscle
A. has a resting membrane potential that is more negative than skeletal muscle fibers. B. responds in an all-or-none fashion. C. has fast waves of depolarization. D. depolarizes when both Na+ and Ca2+ diffuse into the cell. E. has fast waves of repolarization.