Eye

Question 1

Iris

Answer 1

Color part of the eye

Question 2

Cornea

Answer 2

Gathers and focuses incoming light

Question 3

Anterior chamber

Answer 3

In front of iris

Question 4

Constrictor pupillae

Answer 4

Muscle of iris, Constricts pupil under parasympathetic stimulation

Question 5

Aqueous humor

Answer 5

Bathes front of eye

Question 6

Cillary body

Answer 6

Located in posterior chamber, Produces aqueous humor

Question 7

Lens

Answer 7

Helps control refraction of incoming light

Question 8

Canal of Schlemm

Answer 8

Where the aqueous humor drains

Question 9

Suspensory ligaments

Answer 9

When cillary muscles contract, these ligaments change shape of lens (accommodation)

Question 10

Vitreous humor

Answer 10

Transparent gel that supports retina

Question 11

Retina

Answer 11

Converts photons into electrical signals

Question 12

Duplexity/duplicity theory of vision

Answer 12

Contains 2 photoreceptors: one for light and dark and one for color

Question 13

Parallel processing

Answer 13

Ability to simultaneously analyze and combine color, shape, and motion

Question 14

Cones

Answer 14

Photoreceptors for color and visual acuity

Question 15

Rods

Answer 15

Photoreceptors for light and dark

Question 16

Cillary muscle

Answer 16

Part of cillary body and under parasympathetic control

Question 17

Posterior chamber

Answer 17

Between iris (behind) and lens (front)

Question 18

Dilator pupillae

Answer 18

Dilates pupil under sympathetic stimulation

Question 19

Choroid vessels and retinal vessels

Answer 19

Provide eye with nutrients

Question 20

Mascula

Answer 20

Contains mostly cones, some rods (in retina)

Question 21

Fovea

Answer 21

Contains only cones- that’s why visual acuity is best at fovea

Question 22

Optic disk

Answer 22

Blind spot, contains no photoreceptors

Question 23

Bipolar cells

Answer 23

Type of neuron for senses. Transmit signals from photoreceptors to ganglion cells. Also receive input from horizontal cells to pass onto ganglion cells via amacrine cells. (Communicate via gradient potentials)

Question 24

Ganglion cells

Answer 24

Bipolar cells synapse with these and they group together to form optic nerve

Question 25

Amacrine and horizontal cells

Answer 25

Receive input from multiple cones and rods. Accentuate slight differences in each bipolar cell (increase perception of contrasts)

Question 26

Optic chiasm

Answer 26

Where visual fields from nasal side of retina (temporal visual fields) cross paths (optic nerve is before this)

Question 27

Optic tracts

Answer 27

Where fields go after crossing at optic chiasm

Question 28

Lateral geniculate nucleus (LGN)

Answer 28

Where visual signals go after optic chiasm. In thalamus

Question 29

Visual cortex

Answer 29

Where visual signals go after lateral geniculate nucleus and visual radiations. In occipital lobe

Question 30

Superior colliculus

Answer 30

Where visual signals are imputed. Controls responses to visual stimuli and reflexive eye movements

Question 31

Feature detection

Answer 31

Our visual pathways contain specialized cells that specialize in detection of color, shape, or motion

Question 32

Visual radiations

Answer 32

In temporal and parietal lobes. Where visual signals go before visual cortex

Question 33

Sclera

Answer 33

Covers exposed portion of eye | Known as white of the eye