In clinical trials, scientists discover that use of drug X results in a decrease in norepinephrine signaling. In the process of making a list of possible mechanisms of this drug to test, which of the following is NOT a plausible explanation for the effects of drug X?
A. X inhibits synthesis of norepinephrine at the axon terminal.
B. X blocks reuptake of norepinephrine by the terminal.
C. X inhibits norepinephrine release from the terminal.
D. X is an adrenergic receptor antagonist.
E. X stimulates the catabolism of norepinephrine.
Answer: B
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