Exam 1 Remington- Uvea Flashcards Preview

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Flashcards in Exam 1 Remington- Uvea Deck (103)
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1

What is the extent of the iris?

Iris root (junction of iris with choroid) and pupillary ruff (circle around the pupil)

2

The ruff is ______ to the root

Anterior

3

What are the two anatomical portions of the iris separated by the collarette?

Pupillary and ciliary

4

What is the collarette?

Attachment site for embryologic membrane

5

Pupillary portion of the iris

Portion surrounding the pupil

6

Ciliary portion of the iris

From collarette to the root

7

What is the composition of the anterior border layer of the iris?

CT, Fibroblasts and melanocytes

8

Iris processes extend into ____ ____ in the periphery

Anterior chamber

9

What is the composition of the iris stroma?

Loose CT, collagen fibers arranged in trabeculae, melanocytes, clump cells, non-pigmented fibroblasts

10

What are clump cells likely?

Macrophages

11

What are structures located in the iris stroma?

Blood vessels and sphincter muscle

12

Stomal ____ bundles encircle walls of arterioles and venules

Collagen

13

What is the origin of iris arteries?

Major circle of the iris

14

What is the minor circle of the iris?

Incomplete circular vessel within iris stroma

15

The minor circle of the iris is a remnant of _______ development

Embryological

16

What is the composition of the sphincter muscle?

Circular muscle, encircles the pupil

17

What is the action of the sphincter muscle?

Contracts to get miosis

18

What is the myoepithelium?

Anterior iris epithelium

19

What is the basal portion of the anterior iris epithelium?

Dilator

20

Where is the dilator muscle located?

From root to midpoint below sphincter

21

What is the action of the dilator muscle?

Mydriasis, radially oriented

22

What is the origin of the dilator muscle?

Iris root

23

What type of cells are in the posterior iris epithelium?

Pigmented columnar

24

Cells of the posterior iris epithelium are joined by what?

Tight junctions

25

How are the 2 layers of the epithelium positioned?

Apex-to-apex

26

How are the 2 layers of the epithelium joined?

To each other via desmosomes

27

Innervation of the iris sphincter

Parasympathetic

28

Innervation of the iris dilator

Sympathetic

29

What are crypts in the anterior iris surface?

Openings in the anterior border layer

30

Crypts of Fuch

On both sides of collarette