Which of the following is ovoviviparous?
a. some sharks
b. all birds
c. guppies
d. rattlesnakes
e. all of these
E
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The number of ganglia that may be associated with motor neurons of the somatic nervous system is
A. 1. B. 3. C. 0. D. 4. E. 2.
Which of the following intensifies the effect of interferons and promotes the rate of repair?
a) Complement proteins b) Perforin c) Fever d) Macrophages e) Natural killer cells
Body fluid pH will rise dramatically when
A. large amounts of bicarbonate are ingested. B. CO2 levels increase. C. carbonic acid is formed. D. the respiratory rate decreases. E. Na+ is excreted by the kidney.
The hepatic portal vein does not receive blood from which of the following?
A. The gastric veins B. The hepatic veins C. The splenic vein D. The superior mesenteric vein E. The pancreatic vein