CH34 - Nervous System (Cranial Nerves)

Question 1

The brain consists of

Answer 1

• Cerebrum
• Cerebellum
• Brain stem
• Diencephalon

Question 2

Largest portion of the brain

Answer 2

Cerebrum

Question 3

Second largest division of the brain

Answer 3

Cerebellum

Question 4

Reflex centers for hearing, vision, and motor pathways

Answer 4

Midbrain

Question 5

Helps regulate breathing rate

Answer 5

Pons

Question 6

Regulates heartbeat, breathing, vasoconstriction (BP); Reflex centers for vomiting, coughing, sneezing, swallowing, & hiccupping

Answer 6

Medulla oblongata

Question 7

Regulates hunger, sleep, thirst, body temperature, blood pressure & water
balance

Answer 7

Hypothalamus

Question 8

Functions as a sensory “relay center” for incoming nerve impulses; Participates in memory & emotions

Answer 8

Thalamus

Question 9

Provides communication between the brain & the peripheral nerves;
carries messages to or from the brain

Answer 9

Spinal cord

Question 10

Carries information from receptors to the brain/spinal cord

Answer 10

The afferent/sensory nervous system

Question 11

Carries information from the brain or spinal cord to muscles or glands

Answer 11

The efferent/motor nervous system

Question 12

The efferent division of PNS is divided into 2 subdivisions

Answer 12

• Somatic nervous system
• Autonomic nervous system

Question 13

Includes all nerves controlling the muscular system & external sensory receptors; Serves the skin, muscles, joints & tendons

Answer 13

Somatic nervous system (SNS)

Question 14

Operates without any conscious control

Answer 14

Autonomic nervous system (ANS)

Question 15

“Fight or flight”

Answer 15

Sympathetic

Question 16

“Rest or digest”

Answer 16

Parasympathetic

Question 17

How many cranial nerves are there?

Answer 17

12 cranial nerves

Question 18

Cranial nerve 1 & function

Answer 18

Olfactory - sensory nerve (smell)

Question 19

Cranial nerve 2 & function

Answer 19

Optic nerve - sensory nerve (sight)

Question 20

Cranial nerve 3 & function

Answer 20

Oculomotor nerve - motor nerve (eye movement, pupil size, open eyelid)

Question 21

Cranial nerve 4 & function

Answer 21

Trochlear nerve - motor nerve (muscle of eye moves up, down, lateral)

Question 22

Cranial nerve 5 & function

Answer 22

Trigeminal nerve - motor & sensory nerve (largest nerve; face/scalp sensation)

Question 23

Cranial nerve 6 & function

Answer 23

Abducens nerve - motor nerve (moves eye laterally)

Question 24

Cranial nerve 7 & function

Answer 24

Facial nerve - motor & sensory nerve (facial expression, taste sensation)

Question 25

significant to dental professionals because it innervates the head & neck; travels through the parotid salivary gland

Answer 25

Cranial nerve (7th)

Question 26

Cranial nerve 8 & function

Answer 26

Vestibulocochlear nerve - sensory nerve (hearing/balance)

Question 27

Cranial nerve 9 & function

Answer 27

Glossopharyngeal nerve - motor & sensory nerve (swallowing/gag)

Question 28

Cranial nerve 10 & function

Answer 28

Vagus nerve - motor & sensory (muscle of mouth, throat, stomach)

Question 29

Cranial nerve 11 & function

Answer 29

Accessory nerve - motor nerve (Neck)

Question 30

Cranial nerve 12 & function

Answer 30

Hypoglossal nerve - motor nerve (intrinsic/extrinsic tongue muscles)