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anatomy > ANS > Flashcards

ANS Flashcards

1
Q

what is the effector of the somatic NS

A

skeletal muscle

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2
Q

what is the effect of the somatic NS

A

excitation

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3
Q

what is the motor neuron path of somatic NS

A

2 motor neurons (1 in CNS)

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4
Q

what NT is released by the somatic NS

A

Ach: acetylcholine

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5
Q

what is the effector of the autonomic NS

A

cardiac muscles, smooth muscles, glands –> visceral effectors

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6
Q

which NS is self governing and which is voluntary

A

Somatic: voluntary control
autonomic: self governing –> operates without conscious control

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7
Q

what is the effect of the autonomic NS

A

regulate visceral activities by exciting or inhibiting activities in effector tissues

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8
Q

what is the NT released for ANS

A

acetylcholine and epinephrine

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9
Q

what is the motor neuron path of the ANS

A

3 motor neurons (2 in CNS)

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10
Q

what are the lengths of the pre/post ganglionic fibers in the sympathetic NS

A

short pre
long post

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11
Q

what are the lengths of the pre/post ganglionic fibers in the parasympathetic NS

A

long pre
short post

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12
Q

what is the function of the sympathetic NS

A

stimulates organs to inc the activity - excitation

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13
Q

is the sympathetic NS anabolic or catabolic

A

catabolic –> takes larger structures and breaks them down into smaller units

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14
Q

where does the sympathetic NS originate

A

thoracic lumbar region

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15
Q

describe the effects of the sympathetic NS

A

widespread (b/c HIGHLY BRANCHED) and long lasting (b/c adrenal medulla releases epinephrine into BLOOD STREAM)

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16
Q

what is the sympathetic chain

A

paired bundle of nerves that extend from the base of the skull

17
Q

what are the 3 types of path of the sympathetic chain

A
  1. axon synapses direction to the first postganglionic neuron it reaches
  2. axon travels up/down to lower/higher ganglion before synapsing with postganglionic neuron
  3. axon travels thru chain without synapsing until it reaches periphery ganglions and releases to visceral effectors
18
Q

what is the function of the para NS

A

to dec the organs activity - inhibition –> enhances rest and digest activities

19
Q

is para NS anabolic or catabolic

A

anabolic

20
Q

where does the para NS originate

A

cranial and sacral regions

21
Q

describe what the effects of the para NS are like

A

localized and short term

22
Q

what are the target systems controlled by in the para NS

A

75% are controlled by the vagus nerve

23
Q

what are the NT released by the sympathetic NS

A

acetylcholine at ganglion, epinephrine at target

24
Q

what are the NT released by the para NS

A

acetylcholine at ganglion and target

25
Q

what are the control systems for the autonomic nervous system

A

hypothalamus or medulla

26
Q

what are the effects of the para and sym NS on the eye (pupil)

A

sym: dilates pupil
para: constricts –> narrows diameter

27
Q

what are the effects of the para and sym NS on the lacrimal gland

A

sym: no effect
para: stimulates secretion

28
Q

what are the effects of the para and sym NS on the salivary glands

A

sym: stops/slows secretion
para: stimulates secretion

29
Q

what are the effects of the para and sym NS on the heart

A

sym: stimulates rate and force
para: dec rate

30
Q

what are the effects of the para and sym NS on the lungs

A

sym: dilates the tubes
para: constricts tubes

31
Q

what are the effects of the para and sym NS on the sweat glands

A

sym: stimulates secretion
para: no effect

32
Q

what are the effects of the para and sym NS on the blood vessels of skin

A

sym: constrict smooth muscles –> forcing blood to core
para: no effect

33
Q

what are the effects of the para and sym NS on the liver, gall bladder, pancreas

A

sym: inc catabolism
para: inc anabolism

34
Q

what are the effects of the para and sym NS on the peristalsis (smooth muscle contraction of the wall of DT)

A

sym: inhibit
para: stimulate

35
Q

what are the effects of the para and sym NS on the sphincter

A

sym: stimulate
para: inhibit

36
Q

what are the effects of the para and sym NS on the urinary bladder

A

sym: inhibit
para: stimulate

37
Q

what are the effects of the para and sym NS on the adrenal medulla

A

sym: stimulates secretion
para: no effect

38
Q

what tissues are targets of innvervation

A

sym: sweat glands, blood vessels, adrenal medulla
para: lacrimal gland

anatomy (12 decks)

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