Eye Quiz

Question 1

function of ciliary body

Answer 1

• muscle where lens is attached

- contracts to make lens more convex

Question 2

function of suspensory ligament

Answer 2

• holds lens in place

- attaches to ciliary body

Question 3

function of iris

Answer 3

-muscle acts like diaphragm to regulate pupil opening/size

Question 4

function of aqueous humor

Answer 4

• Maintains ocular pressure

- Provides nutrients for lens and cornea

Question 5

function of pupil

Answer 5

-regulate the amount of light that enters the eye

Question 6

function of lens

Answer 6

• a flexible biconvex crystal like structure
• Held in place by suspensory ligament attached to ciliary body
• Divides anterior eye from posterior
• Feels like hard jelly

Question 7

function of cornea

Answer 7

-where light enters eye

Question 8

function of vitreous humor

Answer 8

• Gel-like substance
• Maintains shape, prevents collapsing
• Maintains pressure

Question 9

function of optic disk

Answer 9

• area of retina directly over the optic nerve
• Does not contain any photoreceptors
• Aka: blind spot

Question 10

function of optic nerve

Answer 10

-area of ganglion cell axons that leave the eye

Question 11

function of fovea centralis

Answer 11

• area of a tiny pit that contains only cones

- Area of sharpest vision

Question 12

function of sclera

Answer 12

-white of eye, thick connective tissue, aka fibrous tunic

Question 13

function of choroid coat

Answer 13

• Has dark pigment that prevents light scattering
• Anterior forms ciliary body and iris
• Close vision/bright light-circular muscles contract and pupil constricts
• Distant vision/dim light-radial muscles contract and dilates pupil

Question 14

function of retina

Answer 14

• Extends anteriorly to ciliary body

- Contains photoreceptors (rods and cones)