Which statement does NOT correctly describe hormones that can directly enter a cell?
A. Steroid hormones can enter directly into cells because of their hydrophobic makeup.
B. Water-soluble hormones can enter directly into cells because of their nonpolar makeup.
C. Steroid hormones dissolve poorly in the plasma and are transported to target cells via special protein carriers.
D. Once these hormones enter a cell, they bind to a cytoplasmic receptor and travel as a complex to the nucleus, or they may bind to the receptor after entering the nucleus.
B. Water-soluble hormones can enter directly into cells because of their nonpolar makeup.
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Nitric oxide in the exhaust of cars and trucks results in
a. photochemical smog. b. industrial smog. c. a thermal inversion. d. none of these. e. all of these.
What is the function of inflammation in response to a burn from a hot iron?
a. To destroy the agent causing injury b. To repair the damaged tissue c. To destroy the agent causing injury, to limit the effects of the agent on the rest of the body, and to repair the damaged tissue d. To limit the effects of the agent on the rest of the body
HP1 triggers heterochromatin formation by binding to
a. deacetylated histones H3 and H4. b. Rap1. c. RNA polymerase. d. DNA. e. methylated histone H3.