What do facilitated diffusion and active transport have in common?
A. Both involve transport of a solute down its concentration gradient.
B. Both are examples of carrier-mediated transport.
C. Both involve transport of a solute up its concentration gradient.
D. Neither require ATP to function.
E. Both involve the use of energy provided by ATP.
Answer: B
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The basal nuclei
A) initiate conscious motor activity. B) activate spinal reflexes. C) provide the background patterns of movement involved in voluntary motor activities. D) exert direct control over lower motor neurons. E) act as gatekeepers, filtering out unnecessary sensorimotor activity.
When oxygen levels are low or absent, the cells revert to a process of:
A. aerobic metabolism. B. anaerobic metabolism. C. anaerobic anabolism. D. aerobic catabolism.
Which gland does NOT produce reproductive hormones?
A. ovaries B. testes C. placenta D. thyroid E. pituitary gland
The posterior longitudinal ligament is
A) a paired ligament that connects the laminae of adjacent vertebrae. B) a fibrous band that connects the posterior surfaces of adjacent vertebral bodies. C) a band of fibrous tissue connecting the spinous processes of adjacent vertebrae. D) a longitudinal fibrous band that is attached to the tips of spinous processes from C7 to the sacrum. E) a wide fibrous band that connect the anterior surfaces of the adjacent vertebral bodies.