Eye

Question 1

The eye is derived from what?

Answer 1

Ectoderm

Question 2

What structures of the eye are derived from neruoectoderm of the forebrain?

Answer 2

Retina and pigmented structures

Question 3

What parts of the eye are derived from surface ectoderm?

Answer 3

Lens and cornea

Question 4

Fibrous coats (sclera) is derived from what?

Answer 4

Neural crest mesenchyme

Question 5

The sclera is part of what tunic?

Answer 5

Fibrous (outermost Tunic) q

Question 6

What are characteristics of the sclera?

Answer 6

Thick, dense, FIRM, opaque

Question 7

The sclera maintains it shape when what happens?

Answer 7

Pressure inside the eye increases

Question 8

What structures pass through the sclera?

Answer 8

Blood vessels, neurons

Question 9

What kind of muscles attach to the sclera?

Answer 9

Extraocular

Question 10

Anteriorly, the sclera transitions to the cornea where?

Answer 10

The Limbus

Question 11

What is the primary refractory part of the eye?

Answer 11

Cornea

Question 12

What does the cornea look like>?

Answer 12

Clear, transparent

Question 13

Is the cornea convex or concave to the anterior?

Answer 13

Convex

Question 14

What part of the cornea is continuous with the conjunctiva?

Answer 14

Corneal epithelium

Question 15

What is the largest part of the cornea?

Answer 15

Substantia propria

Question 16

What is in the vascular Tunic?

Answer 16

Choroid, ciliary body, iris

Question 17

Is the choroid thick or thin, good or bad blood supply?

Answer 17

Thin, RICH blood supply

Question 18

Blood vessels in the choroid are heavily supplied by what?

Answer 18

Autonomic vasomotor fibers (especially sympathetic)

Question 19

How is the choroid attached to the sclera?

Answer 19

Loosely

Question 20

Where is the only spot where the choroid is firmly attached to the sclera?

Answer 20

Where the optic nerve penetrates it

Question 21

Is the choroid lightly or darkly pigmented?

Answer 21

Darkly

Question 22

The ciliary body is continuous with what to the posterior?

Answer 22

Choroid

Question 23

The ciliary body is continuous with what to the anterior?

Answer 23

Iris

Question 24

What suspends the lens?

Answer 24

The ciliary body

Question 25

What does the ciliary body produce and where is it found?

Answer 25

Aqueous fluid, anterior segment of the eye

Question 26

Contraction of the ciliary muscle allows the lens to become more_________allowing for _________vision?

Answer 26

Convex, near

Question 27

Besides producing aqueous fluid, it is possible that the ciliary body can produce what?

Answer 27

GAGS

Question 28

What is the colored part of the eye ?

Answer 28

Iris

Question 29

What divides the anterior segment into anterior and posterior chambers?

Answer 29

Iris

Question 30

What two muscles control the size of the pupil ?

Answer 30

Sphincter pupillae, dilator pupillae

Question 31

Sphincter pupillae contains fibers that are arranged in what fashion?

Answer 31

Circumferentially

Question 32

Dilator pupillae is innervated by what fibers?

Answer 32

Sympathetic fibers