Final Exam Prep

Question 1

Which three eye muscles are abductors?

Answer 1

Superior and inferior obliques and lateral rectus

Question 2

Which three eye muscles are adductors?

Answer 2

All rectuses except lateral rectus.

Superior, inferior, and medial

Question 3

What is the action of levator palpebrae superioris?

Answer 3

Opens eyelid

Question 4

Inferior oblique _______ the eye, where as inferior rectus lowers the eye.

Answer 4

elevates/raises

Question 5

Superior oblique _______ the eye, where as superior rectus elevates the eye.

Answer 5

lowers

Question 6

Which layer of the eye is continuous with the dural sheath of the optic nerve?

Answer 6

Sclera

Question 7

Which layer of the eye is continuous with the sclera?

Answer 7

Cornea

Question 8

Where is the choroid layer located?

Answer 8

Between the sclera and retina

Question 9

Which is the inner most layer of the eye?

Answer 9

Retina

Question 10

Which layer is a middle vascular coat?

Answer 10

Choroid middle layer Between the sclera and retina

Question 11

Which muscle closes the eyelids? What is its innervation?

Answer 11

Orbicularis oculi. VII

Question 12

Which muscle opens the upper eyelid?

Answer 12

Levator palpebrae superioris

Question 13

Which eye muscles are under sympathetic control?

Answer 13

Superior tarsal.

Dilator pupillae

Question 14

Which CN opens eye? Which one closes eye?

Answer 14

III. VII

Question 15

What does the contraction of ciliary muscles do to the eye lens?

Answer 15

makes it rounder

Question 16

What does the relaxation of ciliary muscles do to the eye lens?

Answer 16

makes it flatter

Question 17

What two CN does the corneal reflex combine?

Answer 17

V (sensory) and VII (motor)

Question 18

Which eye muscles are under parasympathetic control?

Answer 18

Ciliary muscles

Constrictor pupillae

Question 19

Pupil dilation is under what autonomic innervation?

Answer 19

Sympathetic

Question 20

Pupil constriction is under what autonomic innervation?

Answer 20

Parasympathetic (CN III)

Question 21

Which larynx muscle is the only abductors (opens vocal cord)?

Answer 21

Posterior cricoarytenoid

Question 22

Which three larynx muscles are adductors (closers) of vocal cords?

Answer 22

Lateral cricoarytenoid, thyroarytenoid, transverse arytenoids

Question 23

Which larynx muscle relaxes the vocal cords?

Answer 23

Thyroarytenoid

Question 24

Which larynx muscles tighten the vocal cords?

Answer 24

Cricothyroid and vocalis

Question 25

What is the action oblique arytenoids?

Answer 25

Approximates epiglottis and arytenoids to close glottis

Question 26

Which larynx muscle is the only one innervated by the external laryngeal nerve? What nerve innervates the others?

Answer 26

Cricothyroid.

Recurrent laryngeal.

Question 27

Where does the blood supply to the larynx come from?

Answer 27

Superior and inferior laryngeal arteries

Question 28

From what major arteries do the Superior and inferior laryngeal arteries originate?

Answer 28

External carotid –>Sup. Thyroid –> Sup. Laryngeal

Subclavian –> Thyrocervical trunk –> Inf. Thyroid–> Inf. Laryngeal