An unneutered (intact) male ferret is called a _______________; an unspayed female ferret is called a _______________

Sildenafil (Viagra) achieves its therapeutic action in the treatment of erectile dysfunction by:

A) enhancing neuronal stimulation of the amygdala in the brain. B) stimulating parasympathetic receptors in the nerve fibers leading to the sexual organs. C) stimulating sympathetic receptors in the nerve fibers leading to the sexual organs. D) relaxing vascular smooth muscle, which increases blood flow to the corpus cavernosum.

Subterms that are indented under the Main Term describe the ________

Fill in the blank with correct word.