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Anatomy > Nervous System > Flashcards

Nervous System Flashcards

1
Q

What 2 systems is the nervous system classified into?

A

Central Nervous System

Peripheral Nervous System

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2
Q

Why does the central nervous system consist of?

A

The brain and spinal cord

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3
Q

What are the functions of the central nervous system?

A
  • Process sensory info

* Signals muscles to contract and glands to secrete

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4
Q

What does the peripheral nervous system consist of?

A
  • cranial and spinal nerves
  • ganglia
  • enteric plexuses
  • sense receptors
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5
Q

What is the function of the PNS?

A

Link nerve impulses to the CNS

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6
Q

What does the somatic nervous system do?

A

•conduct impulses from CNS to skeletal muscle

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7
Q

Is the somatic nervous system under voluntary or involuntary control?

A

Voluntary control

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8
Q

What does the autonomic NS do?

A

•motor neurons conduct impulses from CNS to cardiac and smooth muscles and glands

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9
Q

Is the autonomic system under voluntary or involuntary control?

A

Involuntary

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10
Q

What does the enteric NS do?

A
  • causes contraction of smooth muscle in GI tract

* enables secretion of GI fluids and hormones

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11
Q

Is the enteric NS under voluntary or involuntary control?

A

Involuntary

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12
Q

What do neurons do and what do the contain?

A
  • excitable (respond to stimuli)
  • transmit electrical signals
  • contain organelles
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13
Q

What is neuroglia and what do they do?

A

They’re small cells that surround neurons and they support neurons

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14
Q

What converts stimuli into action potentials?

A

Neurons

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15
Q

How fast do neurons travel?

A

.5-130 meters per second or 290 mph

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16
Q

How long are neurons?

A

1mm to 1m in length (longest are in our legs)

17
Q

What does myelin do?

A

Insulates axon and speeds up conduction of impulses

18
Q

What are axons covered with?

A

Myelin and Schwann cells

19
Q

What are gaps between each Schwann Cells called?

A

Nodes of Ranvier

20
Q

What are the three different classifications of neurons?

A
  • Sensory Neurons(afferent)
  • Motor Neurons (efferent)
  • Interneurons
21
Q

What are the functions of the nervous system?

A

Sensory
Integrative
Motor

22
Q

What is the function of sensory neurons?

A

Transmit signals to CNS

23
Q

What is the function of motor neurons?

A

Carry info from the CNS to effectors

24
Q

What is the function of Interneurons?

A

To have contact with nearby neurons

25
Q

Where are sensory neurons unipolar?

A

In the SNS and ANS

26
Q

Where are sensory receptor bipolar?

A

In special sense neurons

27
Q

What polar are motor neurons?

A

Multipolar

28
Q

What polar are Interneurons?

A

Multipolar

29
Q

What does the enteric NS cover and monitor changes in?

A

Gastrointestinal tract

30
Q

What do sensory neurons do in the somatic and autonomic NS?

A

Transfer info to the CNS

Anatomy (18 decks)

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