Lecture 2: Introduction To The ANS

Question 1

Is a sympathetic ganglion or a parasympathetic ganglion closer to the target cell?

Answer 1

Parasympathetic ganglion.

Question 2

Does the stomach have sympathetic or parasympathetic innervation?

Answer 2

Both! Most organs have dual innervation.

Question 3

What does phosphodiesterase do in a penis? And what happens if it is over functioning?

Answer 3

It eats up cGMP (which is a vasodilator - causing an erection). Over functioning phosphodiesterase causes erectile dysfunction.