Which of these transport mechanisms do not fit into the rest of the group listed?
A) osmosis
B) diffusion
C) ion pumps
D) passive transport
E) facilitated diffusion
C) ion pumps
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Two solutions are separated by a selectively permeable membrane. If solution A has a higher concentration of a nonpermeating solute than solution B, then ________
A) the solute will pass down its concentration gradient from solution B to A B) water will pass down its concentration gradient from solution B to A C) water will pass down its concentration gradient from solution A to B D) neither the solute nor water will diffuse E) the solute will pass down its concentration gradient from solution A to B
The coronary sinus does NOT receive blood from the:
A) small cardiac vein. B) brachiocephalic vein. C) middle cardiac vein. D) great cardiac vein.
Which portion of the brainstem is continuous with the spinal cord?
A. Cerebral peduncles B. Pons C. Thalamus D. Medulla oblongata E. Midbrain
Salt balance in humans
a. depends primarily upon control of Na+ intake through salt hunger b. depends primarily upon control of Na+ output by the kidneys c. is poorly regulated d. depends upon Na+ secretion by the kidneys e. is not affected by aldosterone secretion