Exam 2 - T5P1

Question 1

the nervous system has two components. what are they?

Answer 1

central and peripheral

Question 2

is the nervous system fast or slow at internal communication?

Answer 2

fast

Question 3

what are the components of the CNS?

Answer 3

brain and spinal cord

Question 4

do afferent impulses go toward or away from the CNS?

Answer 4

towards the CNS

Question 5

do efferent impulses go toward or away from the CNS?

Answer 5

away from the CNS?

Question 6

are afferent impulses sensory or motor?

Answer 6

sensory

Question 7

are efferent impulses sensory or motor?

Answer 7

motor

Question 8

what are the three parts of the afferent PNS?

Answer 8

• somatic (outer; non-visceral)
• visceral
• special

Question 9

what are the parts of the efferent PNS?

Answer 9

• somatic (outer; voluntary)
• autonomic (involuntary)

Question 10

what are the three parts of the autonomic nervous system?

Answer 10

• sympathetic
• parasympathetic
• enteric

Question 11

what system does the CNS have coordinated sommunication with?

Answer 11

the endocrine system

Question 12

what kind of movement does the CNS control?

Answer 12

voluntary movement

Question 13

what kind of reflexes does the CNS integrate with?

Answer 13

spinal cord reflexes

Question 14

true or false: the CNS is responsible for the assimilation of experiences necessary for memory and learning.

Answer 14

true

Question 15

neurons and ganglia outside of the brain and spinal cord make up the ______ ________ ______

Answer 15

PNS; peripheral nervous system

Question 16

what do somatic motor nerve fibers innervate?

Answer 16

skeletal muscle

Question 17

what do autonomic motor nerve fibers innervate?

Answer 17

organs

Question 18

what are the components of a neuron?

Answer 18

• cell body
• dendrites
• axon (nerve fiber)
• synapse
• Schwann cells (myelin sheaths)

Question 19

where is the nucleus in a neuron?

Answer 19

the cell body

Question 20

what is the purpose of dendrites?

Answer 20

to conduct impulses towards the cell body

Question 21

what is the purpose of the axon?

Answer 21

to carry the electrical impulse (action potential) away from the cell body

Question 22

what do Schwann cells do for impulse speed?

Answer 22

the increase the speed of signal transmission

Question 23

Schwann cells are common in what kind of nerve fibers?

Answer 23

large nerve fibers; fibers that innervate skeletal muscle

Question 24

what is myelin? what is the space between two myelin sheaths called?

Answer 24

• myelin is a lipid protein
• spaces are called Nodes of Ranvier

Question 25

does larger axon size increase or decrease the speed of conduction?

Answer 25

increase

Question 26

impulses must pass the _________ ______ to be passed to the next neuron.

Answer 26

synaptic cleft

Question 27

what is multiple sclerosis?

Answer 27

a neurological disease that damages myelin sheaths

Question 28

what are the effects of MS?

Answer 28

• fatigue
• muscle weakness
• poor motor control
• loss of balance
• mental depression

Question 29

what is thought to be the most important, non-pharmacologic disease treatment?

Answer 29

exercise

Question 30

stopped on slide 21. why is there so much STUFF