The Eye

What type of receptors are found in the eye?

• Mechanoreceptor

• Chemoreceptor

• Thermoreceptor

• Photoreceptor

Sight is only possible due to the detection of what?

• Light

• Movement

• Radiation

• Darkness

Which structure of the eye controls the size of the pupil?

What is the proper term for the 'white of the eye'?

• Cornea

• Iris

• Sclera

• Retina

What is the proper term for the 'third eyelid'?

• Nictitating membrane

• Sclera

• Fovea

• Medulla

What is the name for the transparent cover over the pupil and iris where light is first focused?

The ciliary body contains muscles which change the shape of what?

• Lens

• Pupil

• Iris

• Retina

The retina contains which types of photoreceptors?

• Rods

• Cones

The fovea contains which types of photoreceptors?

• Rods

• Cones

Which photoreceptors are more common in the eyes of nocturnal animals?