The figure illustrates the parasympathetic division. What does "C" represent?
A. preganglionic neurons
B. pelvic splanchnic nerves
C. cranial nerves
D. postganglionic neurons
E. terminal ganglia
E
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Manufacturers of some medications used to treat heartburn advertise that their products shut down the acid-producing pumps in the stomach. Where are these "acid-producing pumps"? In other words, which type of gastric gland cell secretes acid?
A. Enteroendocrine cells B. Parietal cells C. Mucous neck cells D. Chief cells E. Surface mucous cells
The passive current flow of a graded potential fades quickly
Indicate whether the statement is true or false
If there is an accumulation of acidic products in the plasma, one would expect
A. an increase in respiration rate. B. a decrease in respiration rate. C. no influence on respiration rate. D. an increase in residual volume. E. apnea.
Which of the following is the last step in the process of fertilization?
A. A sperm fuses with the egg's plasma membrane. B. The capacitated sperm release their acrosomal enzymes to penetrate through the cells surrounding the egg. C. The sperm nucleus enters the egg, and the egg immediately prevents any further sperm from gaining access by forming a fertilization membrane that a sperm cannot penetrate. D. The nuclei of the sperm and egg rupture within the fertilized egg and the chromosomes mix to form a single nucleus.