Autonomic Nervous System Flashcards

1
Q

What are the divisions of the peripheral nervous system?

A

parasympathetic and sympathetic

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2
Q

What is the sympathetic system responsible for?

A

fight or flight, it controls our response to stress

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3
Q

Where are the neurons in the sympathetic system coming out of?

A

thoracic and lumbar

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4
Q

What size are the preganglionic neurons in the sympathetic system?

A

short

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5
Q

What are the preganglionic neurons of the sympathetic system made of and what do they release?

A

they are made of cholinergic fibers and release acetylcholine

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6
Q

How does acetylcholine stimulate the long postganglionic fibers of the sympathetic system?

A

the postganglionic fibers are adrenergic and release epinephrine when stimulated

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7
Q

dopaminergic fibers

A

release dopamine to stimulate the kidneys

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8
Q

What effects does the sympathetic system have on the body?

A
  • dilates eyes to make vision better
    -decrease salivation
    -increases HR or tachycardia
    -increase BP
    -bronchodilation which causes airways to open and get more air
    -the liver undergoes glycogenesis and releases the storage so we have more blood sugar
    -relaxes bladder
    -slow GI motility
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9
Q

alpha 1

A

vascular, acts on the blood vessels, increases BP

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10
Q

alpha 2

A

dealing with the nerves, decreases the motility of the GI

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11
Q

beta 1

A

increases cardiac contractility

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12
Q

beta 2

A

bronchodilation, relaxes muscle of the uterus

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13
Q

What is the function of the parasympathetic system?

A

allows for rest due to no presence of danger

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14
Q

What size are the preganglionic neurons of the parasympathetic system?

A

long

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15
Q

Where are the neurons of the parasympathetic mainly located?

A

they come out of the brainstem

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16
Q

What do the neurons of the parasympathetic release?

A

they release acetylcholine

17
Q

What does the parasympathetic system stimulate?

A

-pupils constrict
-saliva increase
-HR and BP decrease
-bronchoconstriction
-increased GI motility
-bladder contraction and causes voiding

18
Q

What do cholinergic drugs or parasympathomimetics do?

A

-constrict pupils
-increase saliva
-

19
Q

What do sympatholytics or adrenergic antagonists do?

A

can be used to treat hypertension
-beta blockers are an example bc they decrease HR, constrict the airway, and lower the BP

20
Q

What do parasympathetic or anticholinergics do?

A

dilate the lungs
increase HR
dilates the eyes