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PNS > Review > Flashcards

Review Flashcards

1
Q

What structures make up the Central nervous system?

A

Brain and spinal cord

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2
Q

How many cranial nerves are there?

A

12 pairs

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3
Q

What is the nucleus of origin?

A

Motor function; where cell bodies give rise to motor/efferent neurons

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4
Q

Do all neurons have nuclei of origin?

A

no

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5
Q

what is the nuclei of termination?

A

sensory info; cell bodies give rise to sensory/efferent neurons; receive info from sensory PNS neurons and relay info to higher brain centers

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6
Q

Are cell bodies of the nuclei of termination located in or extending to the PNS

A

NO

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7
Q

How many spinal nerves are there?

A

31 pairs

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8
Q

How are spinal nerves attached to the spinal cord?

A

by ventral (anterior) and dorsal (posterior) rootlets

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9
Q

Each spinal nerve splits into what?

A

a ventral (anterior) primary ramus and a dorsal (posterior)primary ramus

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10
Q

Where do sensory (afferent) cell bodies in the PNS synapse?

A

in the CNS

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11
Q

What type of motor neurons are in the PNS?

A

All lower motor neurons

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12
Q

What does the visceral (autonomic) nervous system control?

A

body functions

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13
Q

The heart, lungs, abdominopelvic organs, blood vessels, and arrector pili are all part of what division of the nervous system?

A

sympathetic division

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14
Q

Is the preganglionic neuron or postganglionic neuron longer in the sympathetic division?

A 
Preganglionic = longer
Postganglionic = shorter
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15
Q

Between what vertebrae is the preganglionic neurons located in they sympathetic division?

A

T1- L2/L3

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16
Q

What do the preganglionic and postganglionic neurons in the sympathetic division release?

A 
Preganglionic = ACH
Postganglionic = Norepinephrine
17
Q

The sympathetic division is in control of what scenarios?

A

Fight or flight/ emergency (symp = scared)

18
Q

What are the three splanchnic nerves in the sympathetic division and what do they carry?

A

greater, lesser, and least splanchnic nerves; carrying primary preganglionic sympathetics

19
Q

The parasympathetic division is also called the what?

A

craniosacral division

20
Q

What nerves are in the parasympathetic (craniosacral) division?

A

C.N. 3, 7, 9, 10

Sacral nerves 2, 3, and 4

21
Q

In the Parasympathetic division is the pre or postganglionic neurons longer?

A 
Preganglionic = shorter
Postganglionic = longer
22
Q

What is neurotransmitter is released in the parasympathetic division from both pre and postganglionic neurons?

A

ACH

23
Q

Is the sympathetic division adrenergic or cholinergic?

A

Adrenergic

24
Q

Is the parasympathetic division adrenergic or cholinergic?

A

Cholinergic

25
Q

Cell bodies found in the peripheral ganglion like in the spinal ganglion or cranial nerve ganglion are nuclei? T/F

A

False, it is not nuclei

26
Q

What are the two types of motor neurons in the somatic motor pathway?

A

Upper Motor Neurons and Lower Motor Neurons

27
Q

What are the two types upper motor neurons?

A

Pyramidal and Extra-pyramidal

28
Q

Which upper motor neurons cell bodies are all located in the cerebral cortex?

A

Pyramidal

29
Q

Where are the cell bodies of extra-pyramidal upper motor neurons located?

A

in the brain stem

30
Q

Where do most upper motor neurons cross?

A

the pyramids and descend in the lateral corticospinal tract

31
Q

Where do upper motor neurons synapse?

A

in the anterior horn (primarily Rexed lamina VII) of the gray matter

32
Q

Where do lower motor neurons exit the cord?

A

via anterior (ventral) rootlets and are carried in named nerves to supply somatic skeletal muscles

33
Q

the somatic sensory pathway takes how many neurons to get from PNS to CNS?

A

three neuron pathway (DRG –> thalamus –> cerebral cortex

PNS (3 decks)

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