Quiz on the External Structures of the Eye

What is the function of the lacrimal apparatus?

• Moves the eyeball in different directions

• Regulates the size of the pupil

• Controls the shape of the lens

• Produces tears to keep the eye moist

Which muscles are responsible for moving the eyeball?

• Medial and lateral rectus muscles

• Ciliary and suspensory ligament muscles

• Superior and inferior rectus muscles

• Superior and inferior oblique muscles

What is the outermost layer of the eyeball called?

• Cornea

• Sclera

• Retina

• Choroid

Which part of the eye regulates the size of the pupil?

• Iris

• Ciliary body

• Sclera

• Cornea

What is the innermost layer of the eyeball called?

• Choroid

• Cornea

• Retina

• Sclera

Which cranial nerve extends from the eyeball to the brain?

• CN I

• CN III

• CN II

• CN IV

Where does the aqueous humor fill in the eye?

• Posterior cavity

• Anterior cavity

• Vitreous cavity

• Scleral venous sinus

What changes occur in the eye for near vision?

• Increase in the curvature of the lens, constriction of the pupils, and convergence of the eyes

• Decrease in the curvature of the lens, dilation of the pupils, and divergence of the eyes

• Increase in the curvature of the lens, dilation of the pupils, and convergence of the eyes

• Decrease in the curvature of the lens, constriction of the pupils, and convergence of the eyes

Which photopigment is found in rods?

• Opsin

• Iodopsin

• Melanopsin

• Rhodopsin

Which cells relay information from rods and cones to the visual cortex?

• Photoreceptor cells

• Ganglion cells

• Melanopsin cells

• Bipolar cells