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Physiology > Autonomic Nervous System > Flashcards

Autonomic Nervous System Flashcards

1
Q

What neurons are in the dorsal horn?

A

afferent neurons

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2
Q

What neurons are in the lateral horn?

A

preganglions

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3
Q

What neurons are in the ventral horn?

A

efferent neurons

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4
Q

What motor neuron detects sensation?

A

beta

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5
Q

What motor neuron innervates the muscle for contraction?

A

alpha

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6
Q

What does the PNS do?

A

long term survival

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7
Q

What does the SNS do?

A

immediate survival

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8
Q

Where does the SNS range?

A

T1-L2

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9
Q

Where does the PNS range?

A

brainstem & S2-S4

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10
Q

What is the autonomic ganglia for?

A

communication from pre to post ganglionic neuron

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11
Q

General anatomy of SNS

A

short preganglionic neuron
long postganglionic neuron

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12
Q

Where does SNS preganglionic exit?

A

ventral root

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13
Q

What does SNS postganglionic exit as?

A

gray ramus

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14
Q

What does SNS preganglionic exit as?

A

white ramus

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15
Q

General anatomy of PNS

A

long preganlionic neuron
short postganglionic neuron

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16
Q

What are the cranial nerves of the PNS?

A

X, III, VII, IX

17
Q

Properties of beta adrenergic receptors

A

all activate cAMP
beta 1 is excitatory (cardiac muscle)
beta 2 is inhibitory (ex. respiratory system)

18
Q

What are adrenergic receptors coupled to?

A

G proteins

19
Q

What do nicotinic cholinergic receptors do?

A

cause cation channels to open resulting in depolarization

20
Q

What things happen during sympathetic activity?

A

pupils dilate, heart rate & blood pressure increase, gastrointestinal & urinary functions decrease

21
Q

What things happen during parasympathetic activity?

A

gastrointestinal activates increase, heart rate & blood pressure decrease

22
Q

What adrenergic receptor is responsible for vasoconstriction?

23
Q

What is an autonomic neuroeffector junction?

A

synapses between efferent & effector organs

24
Q

What is the somatic nervous system responsible for?

A

sensation & motor movement

25
Q

Where does the somatic nervous system originate?

A

ventral horn

26
Q

What does the somatic nervous system innervate?

A

skeletal muscle

27
Q

What is the neurotransmitter for somatic nervous system?

A

acetylcholine

28
Q

What are the receptors in skeletal muscle?

A

nicotinic cholinergic

29
Q

What are the components of the reflex arc?

A
  1. sensory neuron
  2. afferent neuron
  3. integration center
  4. efferent neuron
  5. effector neuron

Physiology (11 decks)

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