Once glucose has entered a cell, what prevents
it from diffusing back out of the cell?
a. glucose pumps actively pump it back
b. one side of the cell membrane is permeable
to glucose, but the other side is not
c. glucose inhibitors attach to glucose once
it’s in the cell
d. glucose is phosphorylated preventing it
from leaving the cell
e. glucose is hydrolyzed into two three-carbon
molecules that cannot diffuse in a reverse
direction
D
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An increase in sympathetic nervous activity to arterioles will have little effect on vasoconstriction of the
A) brain and heart. B) heart and kidneys. C) kidneys. D) skeletal muscles. E) gastrointestinal tract
In water, NaOH almost completely separates into Na+ and OH- ions. Thus, NaOH is _____
a. a strong acid b. a strong base c. a weak acid d. a weak base e. neutral
Match the Following equivalent measures
1 gram = 1 kg = 1mm = 1L = 1 meter =
If you place a paper towel in a dish of water, the water will
A) move away from the towel because water molecules have hydrophobic interactions. B) move up the towel because water molecules move quickly as it vaporizes. C) dissolve the towel because water is a good solvent. D) move up the towel as the water adheres to the paper towel while the cohesive water molecules stay bound to each other. E) separate into H+ and OH- ions, which will react with the paper towel molecules.