Anatomy- Chapter 8: Special Senses

Which of the following is NOT a special sense?

• smell

• equilibrium

• sight

• touch

Nearly 70% of all sensory receptors in the body are in the:

• eyes

• nose

• ears

• skin

A delicate membrane called the ______________ lines the eyelids and covers part of the outer surface of the eyeball; it secretes mucus, which helps to lubricate the eyeball and keep it moist.

• conjunctiva

• conjunctivitis

• tarsal gland

• lacrimal apparatus

Lacrimal glands release:

• tears

• waste

• oily secretions

• sweat

Tears contain:

• mucus

• antibodies

• lysozyme

• all of the above

The eye wall is composed of three layers, and its interior is filled with fluids called ________ that help to maintain shape

• humors

• sclera

• vitrea

• cornea

A thin layer of tissue that lines the back of the eye which receives light that the lens has focused, converts the light into neural signals, and sends these signals on to the brain for visual recognition.

• retina

• lacrimal apparatus

• sclera

• cornea

A photoreceptor cell that is responsible for vision in low light levels:

• rod

• cone

• retina

• sclera

Lack of which photoreceptor cell would cause colour blindness?

• cones

• rods

• retinas

• scleras

The blind spot of the eye:

• optic disc

• optic nerve

• conjunctiva

• cornea