Vision

Question 1

muscle that control size of pupil (hole where light waves get into eyes)

Answer 1

iris

Question 2

membrane covers OUTER part of eye (entire eye except cornea)

Answer 2

scilera

Question 3

clear membrane covers FRONT of eye (filters light waves into pupil)

Answer 3

cornea

Question 4

adjusts to create clearest possible picture (projects image into retina)

Answer 4

lens

Question 5

surrounds back of eye (contains photo receptors, specialized for vision)

Answer 5

retina

Question 6

clearest, most detailed image (bullseye, what lens is aiming for)

Answer 6

fovea

Question 7

clear gel that holds shape of eye (gets cloudy in old people)

Answer 7

vitreous gel

Question 8

located in back of eye: sends info to the brain (2 of them)

Answer 8

optic nerves

Question 9

blind spot in eye, no photo receptors here (where they leave the eye)

Answer 9

optic disc

Question 10

retina has two types of receptors: _____ for night + and ______ for day

Answer 10

rods for night + cones for day

Question 11

night vision, peripheral vision, sensitive to light. takes awhile to adjust to light

Answer 11

rods (long, thin blunt ends. no rods in fovea)

Question 12

daytime vision, help pick up details: color, shapes, textures. needs light to activate, adjusts quickly to light.

Answer 12

cones (short, fat, one end tapers @ the point, located in fovea)

Question 13

neurons in eye (axons come together)

Answer 13

bipolar + ganglion cells

Question 14

converting physical energy into neural message (conversion from sensory stimulus energy to action potential)

Answer 14

transduction

Question 15

directs optic nerves to appropriate hemisphere (moves to appropriate side)

Answer 15

optic chiasm

Question 16

this controls opposite sides of the eye (two optic nerves, one for each side of the body)

Answer 16

hemispheres