The minimum level of depolarization required to initiate an action potential in an excitable cell is
called the
a. electrical potential.
b. refractory potential.
c. membrane potential.
d. resting potential.
e. threshold potential.
E
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Which of the following are NOT part of an
embryo or its related structures?
a. embryonic disk b. amniotic sac c. chorion d. endometrium e. more than one of these are NOT a part of an embryo or its related structures
The greatest drop in blood pressure occurs in the
a. arteries. b. arterioles. c. capillaries. d. venules. e. veins.
Which animals would be classified as continuous feeders?
A. worms, clams, and crayfish B. clams, crickets, and dolphins C. clams, baleen whales, and oysters D. oysters, hummingbirds and planarian E. None of these groups are all continuous feeders.
Which of the following processes will occur in the presence or absence of oxygen?
A. glycolysis B. oxidative phosphorylation C. electron transport chain D. citric acid cycle E. cellular respiration