The senses

Front

What is the optic disc?

Back

The optic disc is the point in the eye where the optic nerve exits the retina; it does not contain photoreceptors, making it a blind spot.

Front

What do hair cells do in the auditory system?

Back

Hair cells bend in response to sound vibrations and convert these mechanical signals into electrical signals that the brain can interpret as sound.

Front

What are extrinsic eye muscles?

Back

Extrinsic eye muscles are six voluntary muscles (four rectus and two oblique) that control the movement of the eyeball up, down, and side to side.

Front

Is the tympanic membrane also known as the ear drum?

Back

True, the tympanic membrane is commonly referred to as the ear drum.

Front

What is the general purpose of sensation?

Back

The general purpose of sensation is to detect changes in the environment, both outside and inside the body, which serves as the basis for responses.

Front

What are rods and cones?

Back

Rods and cones are photoreceptor cells in the retina; rods are responsible for vision in low light, while cones are responsible for color vision and detail.

Front

What is the function of the cornea?

Back

The cornea is the transparent front part of the eye that refracts light and helps focus it onto the retina.

Front

What role do the eyelids play in eye health?

Back

Eyelids protect the eyes from debris and help spread tears across the surface of the eye to keep it moist.

Front

What is the function of the lens in the eye?

Back

The lens focuses light onto the retina by changing its shape, allowing for clear vision at various distances.

Front

What is the auditory canal?

Back

The auditory canal is a tube that carries sound waves from the outer ear to the tympanic membrane (ear drum).