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Flashcards in Chapter 8 Deck (26):
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Accommodation

(1)Adaption in response to differences or changing needs; (2)Adjustment of the eye for seeing objects at close range.

1

Blind Spot

Area on the retina without receptors that respond to light. Images that fall on this region are NOT seen. Optic nerve exits the eye on its way to the brain in this region.

2

Chemoreceptors

Receptors sensitive to various chemicals in solution.

3

Choroid

The pigmented nutritive layer of the eye.

4

Ciliary Body

Structure in the eye that releases a transparent liquid called aqueous humor within the eye. Includes ciliary muscle, which control shape of the lens.

5

Cochlea

A cavity of the inner ear resembling a snail shell; houses the hearing receptor.

6

Cornea

The transparent anterior portion of the eyeball.

7

Crista Ampullaris

Sensory organ of rotation located in the semicircular canal of the inner ear. Senses angular acceleration and deceleration.

8

Dynamic Equilibrium

Sense that reports on angular or rotatory movements of the head in space.

9

Iris

The pigmented, involuntary muscle that acts as the diaphragm of the eye.

10

Labyrinth

Bony cavities and membranes of the inner ear that house the hearing and equilibrium receptors.

11

Lens

The elastic, doubly convex structure in the eye that focuses the light entering the eye on the retina.

12

Maculae

Small and highly sensitive part of the retina responsible for detailed central vision.

13

Mechanoreceptors

Receptors sensitive to mechanical pressures such as touch, sound, or contractions.

14

Olfactory Receptors

Detect odors.

15

Organ of Corti

The receptor organ for hearing and is located in the mammalian cochlea.

16

Ossicles

The three bones of the middle ear: hammer, anvil, and stirrup.

17

Photoreceptors

Specialized receptor cells that respond to light energy.

18

Refraction

The bending of light.

19

Retina

Light sensitive layer of the eye; contains rods and cones.

20

Sclera

The firm white fibrous outer layer of the eyeball; protects and maintains eyeball shape.

21

Semicircular Canals

Part of inner ear. Lined with cilia and filled with endolymph fluid. Serve as body's balance organ.

22

Static Equilibrium

Balance concerned with changes in the position of the head.

23

Taste Buds

Receptors for taste on the tongue, roof of mouth, pharynx, and larynx.

24

Tympanic Cavity

The eardrum.

25

Vestibule

Contains a vein.