Which of the following is NOT an antibody class in humans?
a. IgA
b. IgD
c. IgE
d. IgF
e. IgG
D
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What would be the result for a patient if all his spermatogonia went through meiosis and proceeded to develop into spermatids?
A. He would produce twice as many sperm and would be protected against infertility from other causes. B. He would produce twice as many sperm, which would crowd them during later development and lead to morphological defects. C. He would be entirely normal, since this is what usually happens. D. After one round of sperm production he would no longer be able to produce sperm and would be infertile.
When blood oxygen decreases, what hormone increases red blood cell synthesis by stem cells in the bone marrow?
A. Erthropoietin b. Aldosterone c. Renin d. Antidiuretic hormone (ADH)
Actin filaments are bound into bundles of parallel filaments by the proteins
a. filamin and spectrin. b. troponin and tropomyosin. c. profilin and thymosin. d. alpha-actinin and fimbrin e. All of the above
Over many trials, the 99% confidence interval will not include the true population parameter what percent of the time?
A. 0 percent B. 0.5 percent C. 99 percent D. 1 percent