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Sensory System: Structure of the Eye Quiz

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Questions and Answers

What is the function of the cornea in the eye?

It surrounds the eyeball and protects it from damage
It produces tears to moisten the surface of the eye
It provides nutrition to the space between cornea and lens
It bends light entering the eye by refraction and is responsible for 2/3 of the focusing of light onto the retina (correct)

Where is the conjunctiva located?

It is located at the front of the eye, in front of the iris, pupil, and lens
It surrounds the eyeball and protects it from damage
It is a mucus membrane that covers the cornea
It covers the eye and lines eyelids to keep them moist and lubricated (correct)

What is the function of tear ducts and glands in the eye?

To protect the eye from damage by blinking reflexes
To produce a watery fluid that fills the space between cornea and lens
To produce a thin layer of tears that spread over the surface of the cornea at each blink (correct)
To provide nutrition to the space between cornea and lens

What happens to excess fluid produced by tear glands?

It is drained through tear ducts, located in the corner of the eye, draining to the nose (C) Signup and view all the answers

What is the function of aqueous humour in the eye?

To fill the space between cornea and lens and provide nutrition (D) Signup and view all the answers

How does the sclera protect the eyeball?

By being a white tough layer of elastic tissue that surrounds the eyeball (D) Signup and view all the answers

What is the function of vitreous humour in the eye?

Helps maintain pressure within the eye and the shape of the eye (C) Signup and view all the answers

Which part of the eye contracts to widen the pupil in dark environments?

Ciliary muscle (B) Signup and view all the answers

What is the purpose of the suspensory ligaments in the eye?

To attach the lens to the ciliary muscles (C) Signup and view all the answers

In which part of the eye are cones concentrated?

Fovea (A) Signup and view all the answers

What is the function of rods in the eye?

To detect potential threats in dim light conditions (C) Signup and view all the answers

Which part of the ear is responsible for maintaining balance?

Semicircular canals (A) Signup and view all the answers

What is the role of the eustachian tube in the ear?

To equalize air pressure between the middle ear and the atmosphere (C) Signup and view all the answers

Which structure in the eye contains light-sensitive cells connected to nerve cells?

Retina (C) Signup and view all the answers

What is the function of the iris in the eye?

To control the amount of light entering the eye (D) Signup and view all the answers

Which part of the eye is responsible for carrying out the final focusing of light after it passes through the cornea?

Lens (D) Signup and view all the answers

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