RANKL or receptor activators of nuclear factor kB
A) are receptors that bind directly to PTH.
B) are found on the surface of osteoclasts.
C) are molecules that cause osteoblasts to lay down bone.
D) is a signal molecule that stimulates osteoclasts development.
E) causes calcium to be excreted by the kidneys.
D
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Helper T cells do all of the following except
A) trigger B-cell division, plasma cell maturation, and antibody production. B) provide a rapid response to a future exposure to the antigen. C) enhance production of memory and cytotoxic T cells. D) attract macrophages to the affected area. E) enhance nonspecific defenses.
Estrogen exerts a ________ influence on the hypothalamus, increasing secretion of ________ and thus increasing LH and FSH secretion.
A. negative; GnRH B. positive; progesterone C. negative; progesterone D. positive; GnRH
Which molecule is produced as a waste product of the metabolism of glucose by cells?
A. Water B. Carbon dioxide C. Carbon monoxide D. Nitrogen E. Oxygen
The CNS interprets the ________ of stimulus entirely on the basis of the labeled line over which it arrives
A) duration B) intensity C) location D) type E) adaptation