Question 1

Which of the following is NOT considered one of the special senses?

Accepted Answer

Touch

Question 2

The tarsal glands are responsible for producing which type of secretion?

Accepted Answer

Oily secretion that lubricates the eye

Question 3

Which structure is responsible for connecting the conjunctiva with the transparent cornea and secreting mucus to lubricate the eye?

Accepted Answer

Conjunctiva

Question 4

Tears drain from the lacrimal gland into the nasal cavity through which sequence of structures?

Accepted Answer

Lacrimal canaliculi → lacrimal sac → nasolacrimal duct

Question 5

Which of the following is a function of lysozyme found in tears?

Accepted Answer

Destroys bacteria

Question 6

A patient presents with difficulty moving their eye laterally. Which cranial nerve is most likely affected?

Accepted Answer

VI (abducens)

Question 7

Which layer of the eyeball contains the photoreceptors responsible for vision?

Accepted Answer

Sensory layer (retina)

Question 8

Why can the cornea be transplanted without fear of rejection?

Accepted Answer

It lacks blood vessels

Question 9

Which structure regulates the amount of light entering the eye?

Accepted Answer

Iris

Question 10

A patient is unable to see images focused on a particular spot in their retina. Which structure is most likely involved?

Accepted Answer

Optic disc (blind spot)

Question 11

Which type of photoreceptor is responsible for vision in dim light and peripheral vision?

Accepted Answer

Rods

Question 12

The fovea centralis is characterized by which of the following?

Accepted Answer

It is the area of sharpest visual acuity

Question 13

Which of the following best describes the image formed on the retina?

Accepted Answer

Reversed left to right, upside down, and smaller than the object

Question 14

Which equation best represents the refraction of light as it passes through the eye's structures?

Accepted Answer

$$n_1$$ \sin \$$theta_1$$ = $$n_2$$ \sin \$$theta_2$$

Question 15

Aqueous humor is reabsorbed into venous blood through which structure?

Accepted Answer

Canal of Schlemm (scleral venous sinus)

Question 16

Which of the following is TRUE regarding the lens of the eye?

Accepted Answer

It is a flexible, biconvex structure held by the ciliary zonule

Question 17

Which segment of the eye contains the gel-like vitreous humor?

Accepted Answer

Posterior segment

Question 18

Which of the following is a function of the choroid layer?

Accepted Answer

Absorbs light and prevents it from scattering

Question 19

A patient with arteriosclerosis may have changes detected in the retina using which instrument?

Accepted Answer

Ophthalmoscope

Question 20

Which pathway correctly describes the transmission of electrical signals from photoreceptors to the brain?

Accepted Answer

Photoreceptors → Bipolar cells → Ganglion cells → Optic nerve

Special Senses: The Eye and Vision – Anatomy & Physiology Study Notes

Study Guide - Practice Questions