Chemical substances that dissolve in water or react with water to release ions are known as
A. buffers.
B. electrolytes.
C. bases.
D. inorganic compounds.
E. enzymes.
B
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Digestive motility
a. is accomplished by smooth muscle contractions. b. is accomplished by smooth and voluntary muscle contractions. c. may be propulsive in nature. d. both (a) and (b) above. e. both (a) and (c) above.
During the depolarization phase of an action potential in a neuron
A) K+ ions move from inside to outside the membrane. B) Na+ ions move from outside to inside the membrane. C) the Na/K ATPase pumps Na into the cell. D) K+ and Na+ ions trade places across the membrane.
albinism in humans (the lack of pigmentation) is a recessive trait. a man non-albino heterozygous for the albino allele (Aa) and a woman also non-albino and also heterozygous (Aa) plan to marry. use a Punnett square to determine their probability of having an albino child.
a) 25% b) 0% c) 50% d) 100%
Which of the following is the most potent inhibitor (directly or indirectly) of gastric motility and emptying?
A. fat in the duodenum B. acid in the stomach C. carbohydrate in the stomach D. gastrin E. distension of the stomach