Which of the following explains the neural mechanism of an erection?
A. It is an autonomic reflex mediated predominantly by parasympathetic nerve fibers.
B. It is a somatic reflex mediated predominantly by parasympathetic nerve fibers.
C. It is an autonomic reflex mediated predominantly by sympathetic nerve fibers.
D. It is a somatic reflex mediated predominantly by sympathetic nerve fibers.
E. It is an exclusively voluntary action mediated by the cerebral cortex.
Answer: A
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Joey develops a medical condition that decreases his blood viscosity. Assuming no other change (e.g., no compensatory reflex), what happens to his blood pressure?
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The ____ is divided into the papillary portion and the reticular portion
a. peridermis b. dermis c. hypodermis d. epidermis
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