Chapter 13

Question 1

4 major regions of the brain

Answer 1

Cerebrum, diencephalon, brainstem, cerebellum

Question 2

Gray matter

Answer 2

cell bodies, dendrites and unmyelinated axons

Question 3

white matter

Answer 3

myelin of axons

Question 4

meninges

Answer 4

dura matter, aracnoid matter & pia matter

Question 5

how many cranial nerves are there?

Answer 5

12

Question 6

Olfactory nerve

Answer 6

(CNI) sensory, olfaction

Question 7

Optic nerve

Answer 7

(CNII) sensory, vision

Question 8

Oculomotor nerve

Answer 8

(CNIII) motor, four extrinsic eye mucles, elevates eyelid, constricts pupils, round lens of eye

Question 9

Trochlear nerve

Answer 9

(CNIV) motor, superior oblique eye muscle

Question 10

Trigeminal nerve

Answer 10

(CNV) both, sensory-from anterior scalp, face, oral cavity and others..
motor- muscles of mastication and others

Question 11

Abducens nerve

Answer 11

(CNVI) motor- lateral rectus eye muscle

Question 12

Facial nerve

Answer 12

(CNV!!) both, sensory- taste anterior tongue, muscles of facial expression
motor- gland secretions from lacrimal, submandivular and salivary glands

Question 13

Vestibulocochlear nerve

Answer 13

(CNVIII) sensory- hearing & equilibrium

Question 14

Glossopharnygeal nerve

Answer 14

(CNIX) both, sensory- taste to posterior tongue, to part of pharynx
motor- stylopharyngeus muscle, secretions from parotid gland

Question 15

Vagus nerve

Answer 15

(CNX) both, visceral sensory from heart, lungs and abdominal organs
general sensory from part of the pharynx, larynx

Question 16

Accessory nerve

Answer 16

(CNXI) motor- trapezius and sternocleidomastid muscle

Question 17

Hypoglossal nerve

Answer 17

(CNXII) motor- intrinsic and extrinsic tongue muscles