When a monkey performs a task particular neurons fire. These same neurons fire when the monkey simply observes another monkey performing the same task. What is the name that researchers have given to these neurons?

Depression is linked to an ________

a. oversupply of serotonin and an undersupply of norepinephrine b. undersupply of serotonin and an oversupply of norepinephrine c. undersupply of serotonin and norepinephrine d. oversupply of serotonin and norepinephrine

In treating erectile dysfunction, Alprostadil is

A) a drug that increases the level of nitric oxide in the penis. B) an injection that relaxes the muscles surrounding blood vessels in the penis. C) an inflatable type of penile implant. D) a testosterone patch.