Which of the following is most consistent with homeostasis?
A. As the mean blood pressure gradually increases in aging people, the blood vessel walls become thinner.
B. As body temperature decreases, blood vessels in the periphery dilate.
C. Men working in a hot environment drink large quantities of water, and their urine volume increases.
D. As blood pressure falls, blood flow to cardiac (heart) muscle decreases.
E. Elevated blood glucose levels cause insulin secretion to increase, which in turn, causes cells to take up glucose.
Answer: E
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Fertilization of the ovum usually occurs
A) within one hour of ovulation. B) as much as three to four days following ovulation. C) in the ovary. D) in the upper third of the uterine tube. E) in the uterus.
This figure shows a posterior view of the organs of the female reproductive system. Which number indicates the suspensory ligament?
A. 1 B. 2 C. 3 D. 4 E. 5
Answer the following statements true (T) or false (F)
1. Thermoregulatory responses to increased heat are mediated by the sympathetic nervous division. 2. Most disorders of the autonomic nervous system reflect abnormalities of smooth muscle control. 3. Alpha-adrenergic effects are usually stimulatory and mediatory. 4. The adrenal medulla is considered a "misplaced" sympathetic ganglion by some. 5. Acetylcholine is the substance released by the axonal endings of the somatic efferent fibers and by the parasympathetic nerve fiber endings.
Most coronary blood flow occurs during ventricular ________.
Fill in the blank(s) with the appropriate word(s).