The Eye

Question 1

Accessory Structures

Answer 1

Eyebrows, eyelids, conjunctiva, lacrimal apparatus, and eye muscles

Question 2

Palpebrae

Answer 2

Eyelids

Question 3

Conjunctiva

Answer 3

Transparent membrane that lines eyelids, covers the whites of the eye, and lubricates/protects eye

Question 4

Lacrimal Apparatus

Answer 4

Consists of lacrimal gland and associated ducts.

Question 5

Lacrimal Gland

Answer 5

Secrete tears that contain mucus, antibodies, lysozymes, and are important for protection.

Question 6

Extrinsic Eye Muscles

Answer 6

Six straplike extrinsic eye muscles, enable eye to follow moving objects, maintain shape.

Question 7

Lateral Rectus

Answer 7

1 of 6 extrinsic eye muscles. Moves eye laterally. VI abducens.

Question 8

Medial Rectus

Answer 8

1 of 6 extrinsic eye muscles. Moves eye medially. III Oculomotor.

Question 9

Superior Rectus

Answer 9

1 of 6 extrinsic eye muscles. Elevates eye and turns it medially. III Oculomotor.

Question 10

Inferior Rectus

Answer 10

1 of 6 extrinsic eye muscles. Depresses eye and turns medially. III Oculomotor.

Question 11

Inferior Oblique

Answer 11

1 of 6 extrinsic eye muscles. Elevates eye and turns laterally. III Oculomotor.

Question 12

Superior Oblique

Answer 12

1 of 6 extrinsic eye muscles. Depresses eye and turns laterally. IV Trochlear

Question 13

Fibrous Tunic

Answer 13

Forms outmost coat of the eye. Has sclera and cornea.

Question 14

Sclera

Answer 14

Part of fibrous tunic. Protects the eye and anchors extrinsic muscles.

Question 15

Cornea

Answer 15

Part of fibrous tunic. Lets light enter the eye

Question 16

Vascular Tunic

Answer 16

Has 3 regions. Choroid, ciliary body, and iris.

Question 17

Choroid

Answer 17

Part of vascular tunic. Dark brown membrane, supplies blood to eye tunics.

Question 18

Ciliary Body

Answer 18

Part of vascular tunic. Thickened ring of tissue around the lens that anchors the suspensory ligament that holds lens in place.

Question 19

Iris

Answer 19

Part of vascular tunic. Colored part of eye, has the pupil/opening of iris. Regulates light entering the eye.

Question 20

Lens

Answer 20

A transparent flexible structure that allows precise focusing on light onto retina.

Question 21

Lens epithelium

Answer 21

Anterior cells that differentiate into lens fibers

Question 22

Lens fibers

Answer 22

Cells filled with the transparent protein, crystallin

Question 23

Sensory Tunic

Answer 23

Retina. Delicate two-layered membrane.

Question 24

Pigmented layer

Answer 24

Outer layer of retina that absorbs light and prevents scattering

Question 25

Neural Layer

Answer 25

Inner layer of retina that has photoreceptors, bipolar cells, ganglion cells, amacrine, and horizontal cells.

Question 26

Ganglion Cell Axons

Answer 26

Run along the inner surface of the retina, leave the eye as the optic nerve.

Question 27

The optic disc

Answer 27

Site where optic nerve leaves eye. Lacks photoreceptors, causing the blind spot.

Question 28

Rods

Answer 28

Respond to dim light. Used for peripheral vision.

Question 29

Cones

Answer 29

Respond to bright light, have color vision. Found in macula lutea.