Peripheral Nervous System (Part 2)

Question 1

Mature neurons do not

Answer 1

divide

Question 2

Damage to what causes the death of a neuron

Answer 2

the cell body

Question 3

In Peripheral nerves, damaged axons

Answer 3

can successfully regenerate and new axons can grow 1-5 mm/day

Question 4

Damaged axons in the peripheral nerves break down by

Answer 4

Wallerian degeneration (breaks down distally from injury site)

Question 5

In peripheral nerves, the growth of axons can

Answer 5

be blocked by other tissues and thus stop regeneration

Question 6

In the CNS axons, in reference to regeneration

Answer 6

do not regenerate more than 1mm

Question 7

In the CNS axons, the growth of axons may be

Answer 7

able to reroute the nerve pathway

Question 8

How many pairs of cranial nerves are there

Answer 8

12

Question 9

Name the nerves with their numbers

Answer 9

1-Olfactory
2-Optic
3-Oculomotor
4-Trochlear
5-Trigeminal
6-Abducens
7-Facial
8-Vestibulocochlear
9-Glossopharyngeal
10-Vagus
11-Accessory
12-Hypoglossal

Question 10

From the cerebrum to the upper nasal tract; sensory only for smell

Answer 10

Olfactory Nerve

Question 11

from cerebrum to eyes; sensory only for vision

Answer 11

Optic nerve

Question 12

what does the oculomotor nerve do

Answer 12

moves eyes and eyelid

Question 13

What does the Trochlear nerve do and what is special about it

Answer 13

moves eye; the smallest cranial nerve

Question 14

What does the Trigeminal nerve do and what makes it special

Answer 14

sensory (eyes, forehead, and mouth) and motor (chewing); largest cranial nerve

Question 15

What does the Abducens nerve do

Answer 15

Abducts eyes (turns them laterally)

Question 16

What does the facial nerve do

Answer 16

both sensory (taste) and motor (facial muscles, tear and salivary glands)

Question 17

What does the Vestibulochochlear nerve do

Answer 17

Sensory only ( hearing and dynamic equilibrium)

Question 18

What does the Glossopharyngeal nerve do

Answer 18

Sensory (mouth and taste) and motor (swallowing)

Question 19

What does the Vagus nerve do

Answer 19

From Medulla Oblongota to chest and abdomen (motor)
~somatic= speech and swallowing
~autonomic= controls heart and abdominal smooth muscle

Question 20

What does the Accessory nerve do

Answer 20

Motor (muscles in the neck and back)

Question 21

What does the Hypoglossal nerve do

Answer 21

Motor (tongue for chewing, swallowing and speaking).

Question 22

How many spinal nerves are there

Answer 22

31 pairs along the spinal cord, they are mixed nerves (sensory and motor)

Question 23

What is the break down of the spinal nerves

Answer 23

8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal

Question 24

What is the purpose of the spinal nerves

Answer 24

They transmit impulses between the spinal cord and the rest of the body

Question 25

Each nerve of the spinal cord emerges from a

Answer 25

dorsal and ventral root

Question 26

A dorsal root contains

Answer 26

sensory fibers and a dorsal root ganglion

Question 27

A ventral root contains

Answer 27

contains motor fibers

Question 28

What are the components of a reflex arc

Answer 28

1) . Receptor- site of stimulus action
2) . Sensory Neuron- transmits the afferent impulses to CNS
3) . Integration Center- brain or spinal cord
4) . Motor Neuron- Transmits effernt impulses from CNS to effectors
5) . Effector- Muscles or glands that respond to efferent impulses

Question 29

What are the two types of reflex activity

Answer 29

Somatic and Autonomic

Question 30

The somatic reflexes activates

Answer 30

skeletal muscles (stretch reflex and patellar reflex)

Question 31

The autonomic reflex activates

Answer 31

Smooth or cardiac muscles or glands (ciliospinal and papillary reflex)