Autonomic Nervous System Flashcards

1
Q

Adrenergic

A

a nerve ending that releases norepinephrine as the primary transmitter

a synapse in which norepinephrine is the primary transmitter

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2
Q

Cholinergic

A

a nerve ending that releases acetylcholine

a synapse in which the primary transmitter is acetycholine

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3
Q

Sympathetic

A

motor fibers originate in thoracolumbar spinal cord

fight or flight

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4
Q

Parasympathetic

A

motor fibers originate in cranial nerves and sacral spinal cord

rest and digest

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5
Q

PNS: neurotransmitters

A

acetylcholine

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6
Q

SNS: neurotransmitters

A

norepinephrine

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7
Q

M2 Receptors

A

cholinoceptors

location: heart

function:

  • dec cAMP
  • activates K channels
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8
Q

M3 Receptors

A

cholinoceptors

location: effector cells (smooth muscle, glands, endothelium)

function:
inc IP3, DAG cascade

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9
Q

Alpha 1 Receptors

A

adrenoceptors

location:
smooth muscle, glands

function:
-inc Ca2
-causes contraction
-secretion
(causes vasoconstriction)
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10
Q

Alpha 2 Receptors

A

adrenoceptors

location:
nerve endings, some smooth muscle

function:
-dec transmitter release
-causes contraction
(inhibits/monitors A1)

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11
Q

Beta 1 Receptors

A

adrenoceptors

location: cardiac muscle, juxtaglomerular aparatus

function:
-inc HR
-inc force
-inc renin release
(inc stroke volume, inc conductivity)
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12
Q

Beta 2 Receptors

A

adrenoceptors

location: lungs, smooth muscle, liver, heart

function:
-relax smooth muscle
-inc glycogenolysis
-inc HR, force
(bronchodilation)
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13
Q

Beta 3 Receptors

A

adrenoceptors

location: adipose cells

function:
- inc lipolysis

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14
Q

Dopamine 1 Receptors

A

adrenoceptors

location: smooth muscle (kidneys)

function:
-relax renal vascular smooth muscle

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15
Q

Characteristics of Neurotransmitters

A

norepinephrine can have reuptake

acetycholine does not get recycled

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