______ blocks the action of an enzyme that breaks down the signaling molecule that sustains erection.
A) Epinephrine
B) Lipitor
C) Viagra
D) Elequis
E) Ibuprofen

Question

Quizplus · Accepted Answer

Viagra works by blocking the action of phosphodiesterase type 5 (PDE5), an enzyme that breaks down cyclic guanosine monophosphate (cGMP), a molecule that promotes relaxation of the smooth muscle in the penis, thereby sustaining an erection.

______ Blocks the Action of an Enzyme That Breaks Down