Chapter 12 (Nervous System)

Question 1

(Sensory) afferent means _

Answer 1

going towards

Question 2

(Motor) efferent means _

Answer 2

going away from

Question 3

Ganglia are __

Answer 3

a swelling of a nerve body

Question 4

Neurons don’t replicate so they are _

Answer 4

amitotic

Question 5

motor neurons have lots of

Answer 5

dendrites

Question 6

Glial cells are _

Answer 6

nonexcitable

Question 7

Microglial cells _

Answer 7

clean up things that aren’t supposed to be there

Question 8

Action potential involves

Answer 8

depolarization and repolarization

Question 9

Answer 9

1) resting
2) nerve signal
3)open voltage gated channel
4) repolarized
5) resting RMP
6) Hyperpolarized (still Na and K pumped out… as K closes it goes back to RMP)

Question 10

refractory period is

Answer 10

amount of time where stimulus won’t cause an action potential

Question 11

Salfactory (mylinated) conduction is faster than __

Answer 11

continuous

Question 12

Answer 12

memorize

Question 13

Answer 13

memorize

Question 14

(Structural Organization 3or4) Subtypes are __

Answer 14

Multipolar neuron (many dendrites 1 axon)
Bipolar(1 dendrite, 1 axon)
Unipolar (1 process….central and peripheral)
Anaxonic (no axons)

Question 15

The two subtypes of unipolar are _

Answer 15

1) Central
2)Peripheral (sending action potentials)

Question 16

There are 2 functional organizations which are _

Answer 16

1) Sensory N.S. (afferent)
2)Motor N.S. (efferent)

Question 17

Sensory N.S. consists of __(2)

Answer 17

1) Somatic sensory (conscientiously recieve)
2) Visceral Sensory

Question 18

Motor N.S. consists of _(2)

Answer 18

1)Somatic motor (conscience act)
2) automatic motor

Question 19

3 things comprise a nerve, they are _

Answer 19

1) Endoneurium (wraps individual axon…smallest)

2)Perineurium (wraps fascicle…medium size)
3)Epineurium (encloses entire nerve….largest)

Question 20

How many cranial nerves are there?

Answer 20

12

Question 21

(Nerves) The two types of transport are _

Answer 21

1) Anterograde (from cell body to synaptic knobs)

2)Retrograde (from far away place to cell body)