Question 1

Which of the following best describes the function of the lacrimal apparatus?

Accepted Answer

It protects, moistens, and lubricates the eye by secreting tears containing dilute salt solution, mucus, antibodies, and lysozyme.

Question 2

Which component of the lacrimal secretions is responsible for destroying bacteria?

Accepted Answer

Lysozyme

Question 3

The fibrous layer of the eye includes which of the following structures?

Accepted Answer

Sclera and cornea

Question 4

Why is the cornea unique among human tissues in terms of transplantation?

Accepted Answer

It can be transplanted without fear of rejection.

Question 5

Which layer of the eye is responsible for preventing light from scattering within the eyeball?

Accepted Answer

Vascular layer (choroid)

Question 6

A patient presents with an inability to regulate the amount of light entering the eye. Which structure is most likely affected?

Accepted Answer

Iris

Question 7

Which of the following is NOT a function of the extrinsic eye muscles?

Accepted Answer

Regulating the amount of light entering the eye

Question 8

The humors of the eye are best described as:

Accepted Answer

Fluids that fill the interior of the eyeball

Question 9

Which structure is directly responsible for attaching the lens to the ciliary body?

Accepted Answer

Ciliary zonule (suspensory ligament)

Question 10

A patient with damage to the choroid layer may experience which of the following symptoms?

Accepted Answer

Light scattering within the eye, leading to blurred vision

Question 11

Which of the following best explains why the sclera is referred to as the 'white of the eye'?

Accepted Answer

It is a white connective tissue layer visible anteriorly.

Question 12

If the ciliary body is unable to contract properly, what is the most likely consequence?

Accepted Answer

The lens will not be able to change shape for focusing.

Question 13

Which of the following is a correct sequence of the layers forming the wall of the eyeball from outermost to innermost?

Accepted Answer

Fibrous layer, vascular layer, sensory layer

Question 14

A person with a damaged cornea may experience which of the following symptoms?

Accepted Answer

Impaired passage of light into the eye

Question 15

Which of the following statements about the cornea is FALSE?

Accepted Answer

It is opaque and prevents light from entering the eye.

Question 16

Which structure is primarily responsible for giving the eye its color?

Accepted Answer

Iris

Question 17

If the lacrimal apparatus fails to function, which of the following is a likely consequence?

Accepted Answer

Increased risk of eye infection due to lack of lysozyme and antibodies in tears

Question 18

Which of the following best describes the role of the pupil?

Accepted Answer

It is the rounded opening in the iris that allows light to enter the eye.

Question 19

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

Accepted Answer

Preventing light from scattering within the eye

Question 20

A patient with a deficiency in tear production is most likely to experience which of the following?

Accepted Answer

Increased risk of bacterial infection due to lack of lysozyme

Structure and Accessory Structures of the Eye

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