비아그라에 대해

비아그라에 대해

Sexual stimulation that causes an erection leads to the generation and launch of nitric oxide from the penis. Nitric oxide will cause an enzyme, guanylate cyclase, to make cyclic guanosine monophosphate (cGMP) that is definitely largely to blame for rising and decreasing the scale of blood vessels carrying blood to and through the penis and leading

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