Nervous System

Question 1

What 2 systems is the nervous system classified into?

Answer 1

Central Nervous System

Peripheral Nervous System

Question 2

Why does the central nervous system consist of?

Answer 2

The brain and spinal cord

Question 3

What are the functions of the central nervous system?

Answer 3

• Process sensory info

* Signals muscles to contract and glands to secrete

Question 4

What does the peripheral nervous system consist of?

Answer 4

• cranial and spinal nerves
• ganglia
• enteric plexuses
• sense receptors

Question 5

What is the function of the PNS?

Answer 5

Link nerve impulses to the CNS

Question 6

What does the somatic nervous system do?

Answer 6

•conduct impulses from CNS to skeletal muscle

Question 7

Is the somatic nervous system under voluntary or involuntary control?

Answer 7

Voluntary control

Question 8

What does the autonomic NS do?

Answer 8

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

Question 9

Is the autonomic system under voluntary or involuntary control?

Answer 9

Involuntary

Question 10

What does the enteric NS do?

Answer 10

• causes contraction of smooth muscle in GI tract

* enables secretion of GI fluids and hormones

Question 11

Is the enteric NS under voluntary or involuntary control?

Answer 11

Involuntary

Question 12

What do neurons do and what do the contain?

Answer 12

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

Question 13

What is neuroglia and what do they do?

Answer 13

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

Question 14

What converts stimuli into action potentials?

Answer 14

Neurons

Question 15

How fast do neurons travel?

Answer 15

.5-130 meters per second or 290 mph

Question 16

How long are neurons?

Answer 16

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

Question 17

What does myelin do?

Answer 17

Insulates axon and speeds up conduction of impulses

Question 18

What are axons covered with?

Answer 18

Myelin and Schwann cells

Question 19

What are gaps between each Schwann Cells called?

Answer 19

Nodes of Ranvier

Question 20

What are the three different classifications of neurons?

Answer 20

• Sensory Neurons(afferent)
• Motor Neurons (efferent)
• Interneurons

Question 21

What are the functions of the nervous system?

Answer 21

Sensory
Integrative
Motor

Question 22

What is the function of sensory neurons?

Answer 22

Transmit signals to CNS

Question 23

What is the function of motor neurons?

Answer 23

Carry info from the CNS to effectors

Question 24

What is the function of Interneurons?

Answer 24

To have contact with nearby neurons

Question 25

Where are sensory neurons unipolar?

Answer 25

In the SNS and ANS

Question 26

Where are sensory receptor bipolar?

Answer 26

In special sense neurons

Question 27

What polar are motor neurons?

Answer 27

Multipolar

Question 28

What polar are Interneurons?

Answer 28

Multipolar

Question 29

What does the enteric NS cover and monitor changes in?

Answer 29

Gastrointestinal tract

Question 30

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

Answer 30

Transfer info to the CNS