Question 1

Which three cranial nerves innervate the extrinsic eye muscles?

Accepted Answer

Cranial nerves III (oculomotor), IV (trochlear), and VI (abducens)

Question 2

Where is the blind spot located in the human eye?

Accepted Answer

At the optic disk, where the optic nerve exits the retina

Question 3

A patient has '20/70' vision. What does this mean?

Accepted Answer

The patient sees at 20 feet what a person with normal vision sees at 70 feet

Question 4

Which of the following best defines astigmatism?

Accepted Answer

A condition caused by an irregular curvature of the cornea or lens, resulting in blurred vision

Question 5

Which organism(s) possess a tapetum lucidum?

Accepted Answer

Cows only

Question 6

What is the function of the tapetum lucidum in animals that possess it?

Accepted Answer

It reflects light back through the retina, enhancing night vision

Question 7

Label (a) in the first eye diagram indicates which structure?

Accepted Answer

Cornea

Question 8

Label (c) in the first eye diagram indicates which structure?

Accepted Answer

Iris

Question 9

Label (e) in the first eye diagram indicates which structure?

Accepted Answer

Pupil

Question 10

Label (g) in the first eye diagram indicates which structure?

Accepted Answer

Optic disk (blind spot)

Question 11

Label (a) in the second ear diagram indicates which structure?

Accepted Answer

Auricle (pinna)

Question 12

Label (b) in the second ear diagram indicates which structure?

Accepted Answer

External auditory canal

Question 13

Label (c) in the second ear diagram indicates which structure?

Accepted Answer

Tympanic membrane (eardrum)

Question 14

Label (d) in the second ear diagram indicates which structure?

Accepted Answer

Auditory (Eustachian) tube

Question 15

Label (a) in the third ear diagram indicates which structure?

Accepted Answer

Vestibule

Question 16

Label (b) in the third ear diagram indicates which branch of Cranial Nerve VIII?

Accepted Answer

Vestibular branch

Question 17

Label (c) in the third ear diagram indicates which branch of Cranial Nerve VIII?

Accepted Answer

Cochlear branch

Question 18

The three small bones of the middle ear, collectively called the auditory ossicles, are labeled (f), (g), and (h) in the third ear diagram. Which of the following is NOT one of these bones?

Accepted Answer

Cochlea

Question 19

A patient presents with difficulty seeing at night. Which structure, if absent, could explain this symptom in certain animals?

Accepted Answer

Tapetum lucidum

Question 20

If the cochlear branch of Cranial Nerve VIII is damaged, which function is most likely to be impaired?

Accepted Answer

Hearing

Lab Session 8: Eye and Ear (Unit 17) – Study Guidance

Study Guide - Practice Questions

Study Guide - Flashcards