Sense Organs

Question 1

What structures are in the fibrous layer of the eyeball

Answer 1

Cornea, sclera, limbus

Question 2

What structures are in the vascular layer of the eyeball

Answer 2

Choroid, pupil, iris, tapetum lucidum, ciliary muscles, ciliary body, suspensory ligaments

Question 3

What structures are in the nervous layer of the eyeball

Answer 3

Retina & optic disk

Question 4

What structures are in the retina

Answer 4

Rods, cones & fovea centralis

Question 5

Why do domestic anaimals see less colors than humans

Answer 5

They have less cones within their eye structure

Question 6

Are rods or cones more sensitive to light?

Answer 6

Rods

Question 7

Do rods or cones detect color?

Answer 7

Cones

Question 8

Do cones have a high sensitivity to detail?

Answer 8

Yes

Question 9

What are the 2 internal compartments within the eye

Answer 9

Aqueous compartment & vitreous compartment

Question 10

What are the 2 chambers within the aqueous compartment & their locations?

Answer 10

Anterior compartment is located Infront of the iris. the posterior compartment is located behind the iris but Infront of the lens

Question 11

What are the 6 extraocular structures?

Answer 11

conjunctiva, eyelids, conjunctival sac, tarsal glands, nictitating membrane & lacrimal apparatus

Question 12

What is the lateral & medial canthi

Answer 12

Where the eyelids come together

Question 13

what is the conjunctiva?

Answer 13

The thin membrane that covers the surface of front portion of the eyeball & lines the interior portion of the eyelids

Question 14

Lacrimal glands vs. lacrimal puncta

Answer 14

Lacrimal glands produce tears & lacrimal puncta drain tears

Question 15

What is the nictitating membrane?

Answer 15

the 3rd eyelid that domestic animals possess.

Question 16

How does the nictitating membrane move?

Answer 16

Passive movement only. no muscle attachment

Question 17

Tarsal gland function?

Answer 17

Produces a waxy substance on the eyelids to prevent tears from flowing onto the face

Question 18

What is the optic disk?

Answer 18

Where nerve fibers leave the eye

Question 19

What is fovea centrialis?

Answer 19

A dense collection of cones in a small depression in the center of the eye that is only present in humans & primates

Question 20

Area where the visual image is formed, sensed, & converted into nerve impulses

Answer 20

The retina

Question 21

A ring shaped structure located just behind the iris?

Answer 21

Ciliary body

Question 22

The small hole in the center of the eye that constricts in high light & dialates in low light

Answer 22

Pupil

Question 23

The area responsible for the reflection of light in aniamls eyes.

Answer 23

Tapetum lucidum

Question 24

The pigmented area that is “sandwhiched” between the sclera & the retina

Answer 24

Choroid

Question 25

The transparent window in the front of the eye made up of collagen fibers that allows light into the interior of the eye

Answer 25

Cornea

Question 26

the “white” of the eye that is composed of many collagen fibers

Answer 26

sclera

Question 27

The junction between the cornea & the sclera

Answer 27

Limbus

Question 28

What are the 9 major glands of the endocrine system

Answer 28

Hypothalamus, pituitary gland, thyroid, parathyroid, adrenal, pancreases, testes, ovaries,