Drug X Interferes with the Action of Norepinephrine at Synapses

Multiple Choice

Drug X interferes with the action of norepinephrine at synapses. Which of the following mechanisms would NOT explain the effects of X?

A) X inhibits synthesis of norepinephrine at the axon terminal.
B) X inhibits norepinephrine release from the terminal.
C) X blocks reuptake of norepinephrine by the terminal.
D) X is an adrenergic receptor antagonist.
E) X stimulates the catabolism of norepinephrine.