Problem: Clinical Application
a) Viagra (sildenafil citrate) is a prescription drug that is used to treat erectile dysfunction. It enhances the effect of Nitric Oxide (NO), which is a vasodilator. How is this drug effect tive at promoting an erection.
b) After the birth of his second child, Anthony decided to get a vasectomy. How does this pro- cedure prevent fertilization of a female through sexual intercourse?