Autonomic Nervous System I Flashcards Preview

Physiology (Autonomic Nervous System and Muscle) > Autonomic Nervous System I > Flashcards

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