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
Answer: B
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What best describes hydrostatic pressure?
A) Hydrostatic pressure is created by the number of solute particles present in solution. B) Hydrostatic pressure is created by the number of proteins present in solution. C) Hydrostatic pressure is the force that fluids exert against the capillary wall. D) Hydrostatic pressure is the force that proteins exert in solution.
Carrier-mediated transport
a. involves a specific membrane protein that serves as a carrier molecule. b. always moves substances against a concentration gradient. c. always requires energy expenditure. d. two of these answers. e. all of these answers.
Synaptic knobs are at the ends of
A) axons. B) cell bodies. C) dendrites. D) neuroglia.
The substance that can induce an immune response is a( n ) _____. Select one:
a. leukocyte b. antibody c. antigen d. phagocyte