Atomic radiation is useful for treating cancer because
A) radiation affects cancer cells but not normal cells.
B) radiation protects normal cells against the effects of cancer.
C) normal cells are not affected by radiation.
D) radiation harms cancer cells more readily than it does most non-cancer cells.
D
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The primary motor cortex is the surface of the
A) insula. B) precentral gyrus. C) postcentral gyrus. D) arcuate gyrus. E) corpus callosum.
Which of the following cranial nerves is mispaired?
A. Oculomotor - III B. Accessory - XI C. Abducens - V D. Facial - VII
Surfactant decreases the __________ in the alveoli.
A. surface tension B. pressure C. compliance D. volume
The diffusion potential due to the concentration gradient for Na+ across a nerve cell membrane:
A. favors its movement into the cell at the resting membrane potential. B. favors its movement out of the cell at the resting membrane potential. C. is equal and opposite to the electrical potential acting on Na+ at the resting membrane potential. D. Is in the same direction as the diffusion potential due to the concentration gradient for K+. E. favors movement of Na+ in the opposite direction as the electrical potential acting on Na+ at the resting membrane potential.