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Ocular Biology: Outer Tunics of the Eye

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Questions and Answers

What is the shape of the endothelial cells in the cornea?

Columnar
Squamous
Cuboidal
Flattened epithelial-like (correct)

What is the purpose of the pinocytotic vesicles in the endothelial cells of the cornea?

To produce the basement membrane
To regulate corneal temperature
To regulate corneal hydration (correct)
To secrete enzymes for corneal digestion

What is the arrangement of endothelial cells in the cornea in young individuals?

Regular hexagonal (correct)
Linear and uniform
Random and irregular
Scattered and clumped

What happens to the endothelial cells in the cornea with age?

They become fewer in number with heterogeneous size and shape (D) Signup and view all the answers

What is unique about the cell membranes of endothelial cells in the cornea?

They show interdigitation with zonular occludents (C) Signup and view all the answers

What is the function of the endothelial cells in the cornea in terms of corneal hydration?

To transport materials to maintain corneal hydration (C) Signup and view all the answers

What is the response of adjacent endothelial cells to cell loss in the cornea?

They spread to fill the gaps (C) Signup and view all the answers

What is the thickness of the endothelial cells in the cornea?

5 μm (A) Signup and view all the answers

What is unique about the basement membrane of the endothelial cells in the cornea?

It is absent (C) Signup and view all the answers

What can cause a decrease in corneal endothelial cell density?

Damage to corneal endothelial cells (A) Signup and view all the answers