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Nervous System > Introduction CNS PNS > Flashcards

Introduction CNS PNS Flashcards

1
Q

What are the two Nervous Systems?

A

Central Nervous System and Peripheral Nervous System

AKA: CNS and PNS

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2
Q

What does the CNS consist of?

A

Consists of brain and spinal cord

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3
Q

What does the PNS consist of?

A

Consists of spinal and cranial nerves

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4
Q

What are the two kinds of nerves we talk about?

A

Sensory Neurons and Motor Neurons

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5
Q

The sensory neurons are what kind of neurons?

A

Afferent Neurons

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6
Q

The motor neurons are what kind of neurons?

A

Efferent Neurons

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7
Q

What does Afferent neurons mean?

A

takes information TO the CNS

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8
Q

What does Efferent neurons mean?

A

takes information FROM the CNS

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9
Q

e.g. for sensory

A

taste

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10
Q

e.g. for motor

A

brain tells your body what to do (movement)

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11
Q

The PNS consists of how many Spinal Nerves?

A

31 which exit from the Spinal Cord

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12
Q

What are the 31 pairs of the PNS spinal nerves.

A

Cervical –7 Lumbar–7

Thoracic—12 Sacral—5

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13
Q

PNS is part of what nervous system?

A

the Autonomic Nervous System

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14
Q

How does the ANS operate?

A

it operates w/out conscious control

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15
Q

What kind of fibers does the ANS consist of?

A

sensory and motor fibers

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16
Q

What two divisions does the ANS have?

A

Parasympathetic and Sympathetic

17
Q

What is meant by parasympathetic?

A

restful digestive, restorative process

18
Q

What is meant by sympathetic?

A

“Fight or Flight” response

19
Q

Sympathetic Nervous System has what kind of neurotransmitters?

A

norepinephrine

20
Q

What is the function changes of sympathetic nervous system?

A
  1. increased heart rate and blood pressure
  2. pupil dilation
  3. decreased GI motility
  4. decreased salivary secretions
  5. bronchodilation (so we can breathe better)
21
Q

Parasympathetic Nervous System has what kind or neurotransmitters?

A

acetylcholine

22
Q

What is the function changes of parasympathetic nervous system?

A
  1. decreased heart rate and blood pressure
  2. pupil constriction
  3. increased GI motility
  4. increased salivary secretions
  5. bronchoconstriction
23
Q

What is the regional difference of the Sympathetic nervous system?

A

arises from thoracic and lumbar regions of spinal cord

24
Q

What is the regional difference of the parasympathetic nervous system?

A

arises from sacral region and cranial nerves III, VII, IX, and X
(VII-sublingual & submandibular glands; IX-parotid gland)

25
Q

What kind of response is the sympathetic nervous system known for?

A

BIG response

26
Q

What kind of response is the parasympathetic nervous system known for?

A

small response

Nervous System (21 decks)

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