Flashcards in Autonomic Nervous System I Deck (11)
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1
Q
Autonomic nervous system (ANS) definitions
A
- Involuntary system controlling visceral function
- component of the peripheral nervous system
2
Q
ANS components
A
- sympathetic
- parasympathetic
- enteric
3
Q
Characteristics of sympathetic nervous system
A
- “fight or flight”
- pre-ganglionic neurons originate T1-L3
- short pre-ganglionic neurons, long post-ganglionic neurons
4
Q
Sympathetic neurotransmitters
A
- pre-ganglionic: ACh/N
- effector: NE, alpha and beta
5
Q
Characteristics of parasympathetic nervous system
A
- “rest and digest”
- pre-ganglionic neurons originate CN (3, 7, 9, 10) and S2-S4
- long pre-ganglionic neurons, short post-ganglionic neurons
6
Q
Parasympathetic neurotransmitters
A
- pre-ganglionic: ACh/N
- effector: ACh/M
7
Q
Characteristics of somatic nervous system
A
- voluntary
- single motorneuron and skeletal muscle fiber
- cell bodies in CNS
- axons synapse directly on skeletal muscle
8
Q
Somatic neurotransmitters
A
- pre-synaptic: ACh
- motor endplate: nicotinic cholinergic
9
Q
Characteristics of autonomic nervous system
A
- involuntary system primarily controlling visceral organs
- two neurons; pre-ganglionic and post-ganglionic
- pre-ganglionic axons synapse on post-ganglionic neurons which synapse on visceral effector organs
10
Q
Autonomic neurotransmitters
A
- pre-ganglionic: ACh
- post-ganglionic: ACh, NE, or neuropeptides
11
Q
Function of enteric nervous system
A
Regulate secretion, digestion, blood flow, vomiting, etc. in GI tract
