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Anatomy & Physiology Lecture > Peripheral Nervous System > Flashcards

Peripheral Nervous System Flashcards

1
Q

Autonomic Nervous System

A

controls visceral organ activity

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2
Q

Two Neuron System

A 
Preganglionic neuron (fiber)
Postganglionic neuron (fiber)
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3
Q

Preganglionic neuron (fiber)

A

Cell body

located in CNS

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4
Q

Postganglionic neuron (fiber)

A

Cell body

located in ganglia – innervates target organ

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5
Q

Two Branch System

A

Sympathetic

Parasympathetic

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6
Q

Sympathetic system

A

fight or flight

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7
Q

Parasympathetic

A

rest and digest

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8
Q

Sympathetic Branches

A

Thoracic and lumbar origins, Short Preganglionic neuron,
Long Postganglionic neuron
Generally excitatory

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9
Q

Parasympathetic Branches

A 
Cranial and sacral origins
– Long Preganglionic neuron
• Ganglia in or near target organ
– Short postganglionic neuron
– Generally inhibitory
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10
Q

Where are neurotransmitters released?

A

from varicosities

– Do NOT target a single cell

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11
Q

Acetylcholine

A

Ganglion of both branches

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12
Q

Epinephrine/Norepinephrine

A

sympathetic

postganglionic

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13
Q

Acetylcholine

A

parasympathetic

postganglionic

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14
Q

Cholinergic receptors

A

Nicotinic

Muscarinic

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15
Q

Where are Nicotinic receptors found

A

ANS ganglia, Motor End Plates, Non-Specific Cation channels

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16
Q

Where are Muscarinic receptors found

A

Target Tissues and G Protein coupled receptors

17
Q

Adrenergic receptors

A

Alpha (α) adrenergic

Beta (β) adrenergic

18
Q

α1

A

Ca2+ second messenger

– Generally stimulatory

19
Q

α2

A

nhibits adenylate cyclase

– Generally inhibitory

20
Q

β 1

A

Cardiac – stimulatory

21
Q

β 2

A

Generally inhibitory

22
Q

Agonists

A

mimic

23
Q

Antagonists

A

block

24
Q

Neuromuscular Junction

A

Motor neurons innervate skeletal muscle. Motor unit. Terminal Button. Motor end plate

25
Q

Neurotransmitter

A

Acetylcholine. Ca2+ dependent release.

26
Q

End-Plate Potential

A

Similar to a EPSP – but larger

Anatomy & Physiology Lecture (10 decks)

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