Chapter 8

Question 0

Blind Spot

Answer 0

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.

Question 1

Accommodation

Answer 1

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

Question 2

Chemoreceptors

Answer 2

Receptors sensitive to various chemicals in solution.

Question 3

Choroid

Answer 3

The pigmented nutritive layer of the eye.

Question 4

Ciliary Body

Answer 4

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

Question 5

Cochlea

Answer 5

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

Question 6

Cornea

Answer 6

The transparent anterior portion of the eyeball.

Question 7

Crista Ampullaris

Answer 7

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

Question 8

Dynamic Equilibrium

Answer 8

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

Question 9

Iris

Answer 9

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

Question 10

Labyrinth

Answer 10

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

Question 11

Lens

Answer 11

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

Question 12

Maculae

Answer 12

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

Question 13

Mechanoreceptors

Answer 13

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

Question 14

Olfactory Receptors

Answer 14

Detect odors.

Question 15

Organ of Corti

Answer 15

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

Question 16

Ossicles

Answer 16

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

Question 17

Photoreceptors

Answer 17

Specialized receptor cells that respond to light energy.

Question 18

Refraction

Answer 18

The bending of light.

Question 19

Retina

Answer 19

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

Question 20

Sclera

Answer 20

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

Question 21

Semicircular Canals

Answer 21

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

Question 22

Static Equilibrium

Answer 22

Balance concerned with changes in the position of the head.

Question 23

Taste Buds

Answer 23

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

Question 24

Tympanic Cavity

Answer 24

The eardrum.

Question 25

Vestibule

Answer 25

Contains a vein.