Water moves across the plasma membrane into or out of a cell by osmosis when
A) there is an equal solute concentration on both sides of the membrane.
B) water diffuses through a semipermeable membrane toward a higher solute concentration.
C) water diffuses through a semipermeable membrane toward a lower solute concentration.
D) a high solute concentration opens an aquaporin channel.
E) ATP hydrolysis drives aquaporin transport.
Answer: B
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A research laboratory is attempting to collect the content of human red blood cells. The type of solution researchers should use to cause blood cells to lyse (burst) would be
A. hyperosmotic. B. isosmotic. C. hypoosmotic. D. osmotic.
The Northern Hemisphere is most tilted toward the sun in _____
a. spring b. summer c. autumn d. winter
The element in the body with the greatest number of atoms is
a. phosphorus. b. oxygen. c. hydrogen. d. calcium. e. carbon.
Cellular respiration starts in the cytoplasm with the process of
a. glycogenolysis. b. gluconeogenesis. c. glycolysis. d. the Krebs cycle. e. the Citric Acid cycle.