Functions of the Parasympathetic Nervous System

What are the functions of the parasympathetic nervous system?

What is the neurotransmitter associated with the parasympathetic nervous system?

What do the cholinergic receptors do in the body to the eyes, heart rate, blood pressure, GI system, and GU system?

Describe a cholinergic crisis.

What is a reversal agent for a cholinergic crisis?

What diagnoses are at high risk for cholinergic crisis?