Chapter 19 Part 2 Flashcards Preview

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Flashcards in Chapter 19 Part 2 Deck (41):
1

Cell types; olfactory receptors -thermoreceptors; bundles of axons form olfactory nerves -supporting cells - basal (stem) cells

Olfaction (smell)

2

Taste perception involves olfactory input

Gustation (taste)

3

Evalatations in tongue

Papillae

4

Contains taste buds

Vallate, fungiform

5

Do not contain taste buds

Filiform

6

Gustatory receptors,chemoreceptors,supporting cells, basal stem cells

Taste bud cell types

7

Eyebrows,eyelashes,eyelids,eye muscles lacriminal glands- produce tears

Vision (eyes) accessory structures

8

Fibrous (outter), vascular (middle), retina (inner)

Eye layers

9

Consists of cornea, scleara

Fibrous tunic

10

Anterior transparent portion

Cornea

11

Posterior whitish portion

Sclera

12

Consists of choroid, cillary body

Vascular tunic

13

Produce aqueous humor

Cillary processes

14

Alter lens shape for focusing

Cillary muscles

15

Colored part of eye, forms pupil dilates and constricts regulating amount of light entering eye

Iris

16

Consists of neutral portion,pigmented portion

Retina or nervous tunic

17

Containing photoreceptors and ganglion cells that form optic nerve at optic disc

Neutral portion (retina)

18

No rods or cones

Blind spot

19

Contains melanin producing melanocytes that absorb excessive light

Pigmented portion

20

Rods involved with dim (black and white) vision- process light into neural signals

Photoreceptors

21

Involved with color vision and resolution, almost concentrated in fovea centralis (no rods)

Cones

22

Area of highest resolution

Fovea centralis

23

Separated by lens

Eye cavities

24

Contains aqueous humor that produces a intracular pressure

Anterior cavity

25

Abnormal intracular pressure

Glaucoma

26

Located behind lens

Posterior cavity (virtuous chamber)

27

Image formation on retina 4 steps

Refraction,accommodation,constriction,convergence

28

Olification,gustation,vision,balance,hearing

Special senses

29

Bends light rays to focus image 75% occurs at cornea 25% occurs at lens

Refraction (bending)

30

Changes shape of lens -thickens lens increasing focusing power for near vision

Accomindation

31

Of pupil-parasympathetic response that controls intrusisic of muscles of iris

Constriction (narrowing)

32

Enstrinicic eye muscles move both eyes on one set of objects -binocular vision

Convergence

33

Contract pulling choroid forward

Intrinsic cillary muscles

34

Can only see nearby objects -corrected by concave lens

Myopia (nearsightedness)

35

Can only see distant objects -corrected by convex lens.

Hyperopia (farsightedness)

36

Loss of lens transparency

Cantaracts

37

Loss of lens elasticity with age decreasing the ability to see near objects

Presbyopia

38

Irregular curvature of cornea or lens

Astigmatism

39

Loss of rod vision

Night blindness

40

Absense of defiancey of cones

Color blindness

41

Primary visual area

Optical lobe