Which cell type does not release acetylcholine as its primary neurotransmitter?
a. sympathetic preganglionic
b. sympathetic postganglionic
c. parasympathetic preganglionic
d. sympathetic postganglionic
e. alpha motor neurons
D
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High progesterone levels during the luteal phase ________.
A. suppresses FSH and LH B. causes thickening of the endometrium C. causes cervical mucus to thicken D. All of the choices are correct.
Which is not a function of cerebrospinal fluid?
A. CSF transports nutrients and chemicals to the brain. B. CSF helps to remove waste products from the brain. C. CSF helps to promote mitosis within neuronal tissue. D. CSF provides a liquid cushion to protect the brain from sudden movements. E. CSF helps to reduce the effective weight of the brain.
Which is the most likely explanation for the defect in dystrophic epidermolysis bullosa,
in which the skin blisters in response to any touch? A) The skin layers are reversed. B) Collagen fibrils that attach the epidermis to the dermis break down. C) Melanocytes cannot produce melanin. D) The skin has too many melanocytes that produce too much melanin.
If the composition of air is 20 percent oxygen with an atmospheric pressure of 700 mm Hg, the partial pressure of oxygen would be
A. 14 mm Hg. B. 20 mm Hg. C. 140 mm Hg. D. 700 mm Hg. E. 1400 mm Hg.