Sensory Mechanism (8.10) Part 2 Flashcards Preview

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Flashcards in Sensory Mechanism (8.10) Part 2 Deck (34):
1

The eyes are a collection of _______receptors.

photo

2

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

Oscilli

3

Type of light detecting structure seen in Platyhelminthes.

Eye Cup

4

Eyes with a ______ as seen in most other animals.

lens

5

Found in invertebrates, such as insects.

compound eyes

6

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

ommatidia

7

This type of eye is great for detecting movement.

compound eye

8

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

Single Eye

9

This is referred to as the eye white.

Sclera

10

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

Choroid

11

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

conjunctiva

12

inflammation of the conjunctiva

Conjunctivitis

13

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

Cornea

14

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

iris

15

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

smooth

16

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

Retina

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.

rods

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.

Cones

19

red, blue, green

Photopsin Pigments

20

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

Lens

21

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

Accommodation

22

This term refers to a misshaped lens.

Stigmatism

23

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

Myopia

24

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

Hyperopia

25

Term refers to lens degeneration associated with old age.

Presbyopia

26

This term refers to a “cloudy lens”.

Cataract

27

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

Glaucoma

28

These are the muscles that stretch the lens.

Ciliary Body

29

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

Aqueous Humor

30

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

Vitreous Humor

31

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

Optic Nerve

32

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

Optic Chiasm

33

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

Lateral Geniculate Nuclei

34

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

Primary Visual Cortex of the Occipital lobe of cerebrum