Unit 6 - Autonomic Nervous System - Parasympathetic (Cholinergic) System Part 2

These flashcards cover key terms and concepts related to the Autonomic Nervous System, focusing on the Parasympathetic system and cholinergic mechanisms.

Autonomic Nervous System (ANS)

Part of the Peripheral Nervous System that regulates involuntary bodily functions.

Sympathetic Nervous System (SNS)

Part of ANS responsible for 'fight or flight' responses.

Parasympathetic Nervous System (PNS)

Part of ANS responsible for 'rest and digest' functions.

Acetylcholine (Ach)

A neurotransmitter that plays a key role in the autonomic nervous system, regulating functions such as heart rate and digestive processes.

Nicotinic receptors

Receptors that respond to acetylcholine and are found in the autonomic ganglia.

Muscarinic receptors

Receptors activated by acetylcholine that influence various involuntary functions, including heart rate.

Cholinergic agonists

Medications that mimic the action of acetylcholine.

Anticholinergics

Medications that block the action of acetylcholine at muscarinic receptors.

Cholinergic Toxidrome

A syndrome caused by excessive acetylcholine, characterized by symptoms like sweating, salivation, and pinpoint pupils.

Atropine

A muscarinic antagonist used to treat bradycardia and reduce secretions.

Myasthenia Gravis

An autoimmune disorder affecting neuromuscular transmission that can be treated with cholinesterase inhibitors.

Indirect-acting muscarinic agonists

Medications that inhibit the breakdown of acetylcholine, thus enhancing its actions.

Physostigmine

An indirect-acting muscarinic agonist used as an antidote for atropine overdose.

Alpha 1 receptors

Adrenergic receptors that cause vasoconstriction when stimulated.

Beta 2 receptors

Adrenergic receptors that cause bronchodilation when stimulated.