Sensory Mechanism (8.10) Part 2

Question 1

The eyes are a collection of _______receptors.

Answer 1

photo

Question 2

Type of light detecting structure seen in Cnidarians and Bi-valves

Answer 2

Oscilli

Question 3

Type of light detecting structure seen in Platyhelminthes.

Answer 3

Eye Cup

Question 4

Eyes with a ______ as seen in most other animals.

Answer 4

lens

Question 5

Found in invertebrates, such as insects.

Answer 5

compound eyes

Question 6

A compound eyes is many _______ working together. (Produces multiple pictures of the same object.)

Answer 6

ommatidia

Question 7

This type of eye is great for detecting movement.

Answer 7

compound eye

Question 8

Found in mollusks and vertebrates. (These are good for detecting definition.)

Answer 8

Single Eye

Question 9

This is referred to as the eye white.

Answer 9

Sclera

Question 10

This layer contains the blood vessels and black pigment for reducing sun light glare.

Answer 10

Choroid

Question 11

This layer is involved with mucous production to keep the eye cells moist.

Answer 11

conjunctiva

Question 12

inflammation of the conjunctiva

Answer 12

Conjunctivitis

Question 13

this layer is the clear part of the sclera. (It also acts as a fixed lens.) (Prevents debris from entering.)

Answer 13

Cornea

Question 14

This is the “colored” choroid (It controls the amount of light entering the eye through the pupil.)

Answer 14

iris

Question 15

The cornea is operated by _______ muscle automatically for you. (Autonomic nervous system.)

Answer 15

smooth

Question 16

This layer of the eye is the site of the photoreceptors.(It appears yellow upon dissection.)

Answer 16

Retina

Question 17

This receptor cells are for seeing black, white, and shades of grey. They are the most abundant in all animals having these structures. They possess Rhodopsin Pigment.

Answer 17

rods

Question 18

These receptor cells are used for seeing color. They are outnumbered 20:1 by the rods. They are found in vertebrates: but not all.

Answer 18

Cones

Question 19

red, blue, green

Answer 19

Photopsin Pigments

Question 20

This structure focuses light. (It is made of a transparent, stretchable protein called crystalline.)

Answer 20

Lens

Question 21

This is the “focusing” of the eye for near vs. distant vision… This requires it to stretch.

Answer 21

Accommodation

Question 22

This term refers to a misshaped lens.

Answer 22

Stigmatism

Question 23

(A.K.A. nearsighted) (You can’t see far away objects clearly.)

Answer 23

Myopia

Question 24

(A.K.A. farsighted) (You can’t see close up objects clearly.)

Answer 24

Hyperopia

Question 25

Term refers to lens degeneration associated with old age.

Answer 25

Presbyopia

Question 26

This term refers to a “cloudy lens”.

Answer 26

Cataract

Question 27

Condition of having too much vitreous humor; results in too much pressure in the eye.

Answer 27

Glaucoma

Question 28

These are the muscles that stretch the lens.

Answer 28

Ciliary Body

Question 29

This is the fluid in the front of the eye. (It is mostly water… “aqueous”; humor means “fluid”.)

Answer 29

Aqueous Humor

Question 30

This is the fluid in the back of the eye (It is jelly-like… “vitreous”) (It gives the eye its shape.)

Answer 30

Vitreous Humor

Question 31

There is one for each eye. (It takes the action potential to the brain.)

Answer 31

Optic Nerve

Question 32

Collects rights and lefts in to one side of brain. (Located in the base of the brain.)

Answer 32

Optic Chiasm

Question 33

These groups of neurons make the right or left “side” picture.

Answer 33

Lateral Geniculate Nuclei

Question 34

The site of integration of “halves” into 1 picture.

Answer 34

Primary Visual Cortex of the Occipital lobe of cerebrum