Which STD is characterized by the growth of warts on the genitals?
A. Gonorrhea
B. Syphilis
C. HPV
D. HIV
Answer: C
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__________ (cells) secrete hydrochloric acid that breaks down bone and releases calcium and phosphate into the blood.
Fill in the blank(s) with the appropriate word(s).
The process of preventing micturition in spite of initiation of the reflex involves
a. the cerebral cortex b. voluntary stimulation of the motor neuron supplying the external urethral sphincter c. voluntary stimulation of the internal urethral sphincter via its parasympathetic nerve supply d. both a and b e. a, b, and c
Salt balance in humans
a. depends primarily upon control of Na+ intake through salt hunger b. depends primarily upon control of Na+ output by the kidneys c. is poorly regulated d. depends upon Na+ secretion by the kidneys e. is not affected by aldosterone secretion
Much of the digestive system relies on the activity of enzymes. The stomach secretions include an enzyme (pepsin) along with HCl to reduce the pH in the stomach to a pH of 2. When the food moves into the small intestine, there are multiple secretions to
raise the pH to 7. How would this pH change affect the activity of the stomach enzyme, pepsin? A) It would increase the activity of pepsin B) It would denature pepsin. C) There would be no change in the activity of pepsin. D) The active site would be increased.