Chapter 14: Peripheral Nervous System

Question 1

Mechanoreceptors

Answer 1

Respond to mechanical force

- Touch, pressure, stretch, vibrations, and itch

Question 2

Thermoreceptors

Answer 2

Respond to temperature changes

Question 3

Chemoreceptors

Answer 3

respond to chemicals in solution (molecules tasted or smelled)and to change in blood chemistry

Question 4

Photoreceptors

Answer 4

in the eye respond to light

Question 5

Nociceptors

Answer 5

Respond to harmful stimuli that results in pin

Question 6

Spinal peripheral nerves arise from the spinal cord _____ their respective vertebrae

Answer 6

Above

- this yields 8 pairs of cervical nerves and 31 spinal nerves total

Question 7

Power generating muscle fibers are called _____ and are innervated by an alpha _____ neuron

Answer 7

Extrafusal; motor

Question 8

Roots: Brachial plexus

Answer 8

C5-T1

Question 9

Trunks: Brachial plexus

Answer 9

1. Upper
2. Middle
3. Lower

Question 10

Divisions: Brachial plexus

Answer 10

Anterior and posterior

Question 11

Cords: Brachial plexus

Answer 11

Lateral, Medial, posterior

Question 12

Terminal branches: Brachial plexus

Answer 12

1. Musculocutanous
2. Median
3. Ulna
4. Radial
5. Axillary

Question 13

____ loss of extensor muscles and wrist drop

Answer 13

Radial nerve injury

Question 14

_____ elbow causing tingling or “funny bone” sensation

Answer 14

Ulnar nerve injury

Question 15

Paraplegia

Answer 15

Damage occurs between T1 and L2

- Lower limbs affected not upper

Question 16

Quadriplegia

Answer 16

damage in the cervical region of the spina cord

- All four limbs are effected

Question 17

Dermatone

Answer 17

Area of skin innervated by the cutaneous branch from a single nerve

Question 18

T or F: Receptors can also be classified by their structure

Answer 18

True

- free nerve endings, encapsulated receptors, and proprioceptors

Question 19

Free nerve ending are associated with ___ response

Answer 19

pain