Parietal cells secrete
A) pepsinogen.
B) gastrin.
C) mucus.
D) hydrochloric acid.
E) enteropeptidase.
D
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A substance that can stimulate a primary immune response but is unable to produce the symptoms of a disease is a(n) ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following best describes the cerebrum?
A) motor command center B) visceral command center C) executive suite D) decussation center
During thyroid hormone secretion,
a. the follicular cells phagocytize a piece of colloid. b. T4 and T3 are split off of thyroglobulin by lysosomal enzymes within the follicular cell and subsequently diffuse out of the cell into the blood. c. T4 and T3 are secreted by exocytosis of the colloid that has been internalized by the follicular cells. d. both (a) and (b) above. e. both (a) and (c) above.
Summation that results from the cumulative effect of multiple synapses at multiple places on the neuron is designated:
A) spatial summation. B) hyperpolarization. C) temporal summation. D) impulse transmission.