Parasympathetic Nervous System

This flashcard set covers crucial concepts related to the parasympathetic nervous system, including key neurotransmitters and receptor types.

Parasympathetic Nervous System (PSNS)

A division of the autonomic nervous system that conserves energy and is responsible for rest and digest functions.

Acetylcholine (ACh)

A neurotransmitter released from parasympathetic preganglionic and postganglionic neurons.

Nicotinic Receptors

Cholinergic receptors found on the cell bodies of sympathetic and parasympathetic postganglionic neurons that, when activated by ACh, open gated Na+ channels leading to excitation.

Muscarinic Receptors

Cholinergic receptors located in effectors activated by parasympathetic postganglionic neurons, affecting smooth muscle, cardiac muscle, and glands.

Excitation in PSNS

Primarily excitatory response of the parasympathetic nervous system due to the action of ACh on cholinergic receptors.