Ciliary body

Question 1

APex of ciliary body terminates at the __________.

Answer 1

Ora serrata

Question 2

Base of the ciliary body, one tip terminates at the ________. The middle of the base joins the root of the iris. The other tip of the base borders the posterior chamber.

Answer 2

Scleral spur

Question 3

A ring like structure just behind the iris and surrounding the crystalline lens of the eye.

Answer 3

Ciliary body

Question 4

Ciliary body is divided into 2 parts or regions…

Answer 4

Pars plicata

Pars plana

Question 5

The wider, anterior portion containing the ciliary process.

Answer 5

Pars plicata

Question 6

There are approx 70 to 80 __________that extend into the posterior chamber, and the regions between them are called ____________. (know it)

Answer 6

ciliary processes

Valleys of kuhnt

Question 7

A ciliary process measures approximately ____ in length, ___ in width, and ___ in height.

Answer 7

2 mm length
0.5 mm width
1 mm in height

Question 8

One leg of the triangle borders the ______.

Answer 8

sclera

Question 9

One leg of the triangle borders the ___________.

Answer 9

posterior chamber

Question 10

The _______ is the flatter region of the ciliary body.

Answer 10

pars plana

Question 11

The ora serrata has a serrated pattern, the forward-pointing apices of which are called teeth or ____________. The rounded portions that lie between the teeth are called _________.

Answer 11

Dentate processes

Oral bays

Question 12

_________ attach between ciliary body and lens. Assist in manipulating lens for accommodation.

Answer 12

Zonule fibers

Question 13

What are the layers of the ciliary body? (from superficial to deep)

Answer 13

Supraciliaris
Ciliary muscle
Ciliary stroma
Ciliary Epithelium

Question 14

The outermost layer of the ciliary body adjacent to sclera. What kind of tissue and what does it contain?

Answer 14

Supraciliaris
Loose connective tissue
Melanocytes, fibroblasts, and collagen bands
Has capacity to accumulate fluid

Question 15

This is composed of 3 smooth muscle fibers oriented in different directions.

Answer 15

Ciliary muscle- (each muscle fiber resembles a long narrow V)
Longitudinal muscle fibers- (lies adjacent to supraciliaris and parallel to sclera.
Radial muscle fibers- (originate at scleral spur insert into connective tissue near base of ciliary process)
Circular- (innermost region of ciliary muscle, sphincter type action. located at base of iris.)

Question 16

3 types of ciliary muscle fibers…

Answer 16

Longitudinal
Radial
Circular

Question 17

What is main system that innervates the ciliary body?

Answer 17

Parasympathetic stimulation= activates the muscle for contraction, sympathetic innervation likely has an inhibitory effect

Question 18

What is a highly vascularized, loose connective tissue that lies between the ciliary muscle and the epithelial layers. Forms the core of each of the ciliary processes.

Answer 18

Stroma of the ciliary body (loose connective tissue ‘filler’)

Question 19

The major arterial circle of the iris is located in the ciliary stroma ________ to the circular muscle near the _________.

Answer 19

Anterior

Iris root

Question 20

Epithelium has 2 layers, how are they positioned?

Answer 20

Connected apex to apex, via gap junctions between the apical surfaces provide a means of cellular communication between the layers and are important in formation of aqueous.

Question 21

What is the ciliary body epithelium apex to apex orientation?

Answer 21

single layered optic vesicle
Optic cup invagination
Dual layered cup

Question 22

Outer layer of epithelium of ciliary body is composed of what type of cells?

Answer 22

Pigmented and cuboidal, and the cells are joined by desmosomes and gap junctions

Question 23

Anteriorly the epithelium is continuous with ______, and posterior it is continuous with the _______.

Answer 23

Anterior iris epithelium

Posterior retinal pigment epithelium (RPE)

Question 24

A ______________ attaches the pigment epithelium to the stroma.

Answer 24

Basement membrane

Question 25

Which of two layers produce aqueous? Also secretion

Answer 25

Non-pigmented

Question 26

Inner epithelial layer is _____________ and composed of columnar cells in the pars plana and cuboidal cells in the pars plicata

Answer 26

non-pigmented

Question 27

What do the ridges of connected to basement membrane function as?

Answer 27

Increasing surface area for more production and secretion

Question 28

The ciliary body does what 2 things????

Answer 28

Produces and secretes AQUEOUS humor

Musculature causes ACCOMMODATION and can affect aqueous outflow.