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UNIT 2 > ANS > Flashcards

ANS Flashcards

1
Q

Subdivision of the peripheral nervous system that regulates body activities that are generally not under conscious control

A

Autonomic nervous system

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2
Q

What innervates non-skeletal (Non-somatic) muscles

A

Visceral motor

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3
Q

Neurons in ANS serve?

A

Cardiac muscle (heart)
Smooth Muscle (walls of viscera and blood vessels)
Internal organs
Skin

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4
Q

Two divisions of ANS

A

Sympathetic

Parasympathetic

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5
Q

Thoracolumbar arises from T1 to L2/3
Fight, flight, or fright (freeze)
Increases heart rate, blood pressure, bronchodilation, increasing pupil size

A

Sympathetic

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6
Q

Craniosacral arises from specific cranial nerve nuclei and S2-4
Rest and digest
Increased gastric secretions and peristalsis, slowing heart rate, decreasing pupil size
Normal function and energy conservation
Homeostatis

A

Parasympathetic

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7
Q

Sympathetic does what

A

Catabolic (breaking down)

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8
Q

Parasympathetic does what

A

Anabolic (Building up)

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9
Q

Impulse conduction in both ANS systems requires 2 separate neurons

A

Presynaptic neuron

Postsynaptic neuron

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10
Q

Synapses with postsynaptic neuron

A

Presynaptic

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11
Q

Cell body in autonomic ganglia outside CNS

Synapse on effector organs

A

Postsynaptic neuron

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12
Q 
Cell bodies of motor neurons in CNS (spinal cord)
Their axons (sheathed in spinal nerves) extend all the way to their skeletal muscles
A

Somatic division

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13
Q

Chains of two motor neurons
1st- preganglionic neuron (in brain or cord)
2nd- ganglionic neuron (cell body in ganglion outside CNS)
Slower because lightly myelinated or unmyelinated

A

Autonomic system

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14
Q

Axon of 1st (preganglionic neuron) does what

A

Leaves CNS to synapse with the 2nd (ganglionic neuron)

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15
Q

Axon of 2nd (ganglionic neuron) does what

A

Extends to the organ is serves

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16
Q

Sympathetic releases what neurotransmitter

A

Norepinephrine

17
Q

Para-sympathetic releases what neurotransmitter

A

Acetylcholine

18
Q

Head, upper limb, thoracic viscera (foregut) are innervated by what spinal cord

A

T1-T6

19
Q

Body wall, abdominal viscera (midgut) are innervated by what spinal cord

A

T7-T11

20
Q

Lower limb, pelvic viscera (hindgut) are innervated by what spinal cord

A

T12-L2(3)

21
Q

Superior cervical ganglion is where

A

At base of cranium

22
Q

Inferior ganglion impar is where

A

At coccyx

23
Q

What link to form sympathetic chains or trunks?

A

Paravertebral ganglia

24
Q

Are in a plexus around main aortic branches

A

Prevertebral ganglia

25
Q

Fibers reach the sympathetic trunk through the

Only present where?

A

White rami communicans

From T1 to L2 or 3

26
Q

Once in sympathetic trunk, presynaptic fibers do one of 4 things

A

Ascend then synapse
Descend then synapse
Synapse right away
Pass through trunk without synapsing

27
Q

Splanchnic nerves do what

What pass through the cardiopulmonary splanchnic nerves to get to get to the plexuses (cardiac, pulm, esophagus)

A

Convey visceral efferent and afferent fibers

Postsynaptic fibers

28
Q

Outnumber presynaptic fibers and are longer since they travel to all parts of the body

A

Postsynaptic sympathetic fibers

29
Q

Postsynaptic fibers pass from sympathetic trunks to where?

A

Anterior (ventral) rami of spinal nerves through the gray rami communicantes

30
Q

Postsynaptic sympathetic fibers enter

A

All 31 branches of spinal nerves

31
Q

Pass to the prevertebral ganglia thru abdominopelvic splanchnic nerves (greater, lesser, Least, and lumbar)

A

Presynaptic fibers

32
Q

Some presynaptic fibers pass thru the prevertebral ganglia without synapsing to end at the medulla of the

A

Adrenal gland

33
Q

More restricted than sympathetic
Supplies head, visceral cavities of trunk, and erectile tissue
does not reach the body wall or limbs
Most fibers are not part of spinal nerves of branches (except S2-S4)

A

Parasympathetic system

34
Q

Presynaptic neuron cell bodies are located

A

In gray matter of brain stem with cranial nerve fibers making up the cranial parasympathetic outflow
Also in gray matter of S2-S4

35
Q

Do we have sensation from normal organ function?

A

No

36
Q

If sensation is detected it may be

A

Poorly localized pain

True pain from distension, strong spasms, pathology, chemical irritants

37
Q

What can be generated by sensation

A

Visceral reflexes (blood pressure, breathing rate)

UNIT 2 (5 decks)

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