Aqueous And Vitreous Humor Flashcards
What is the aqueous humor
Clear, alkaline liquid that occupies the anterior and posterior chambers of the eye
How does aqueous compare to blood plasma
It has less proteins and glucose
More lactic acid and ascorbic acid
What is the function of aqueous
-provide necessary metabolites (oxygen, glucose) to the avascular lens and cornea
Where is the aqueous made
Pars plicata
Where is the aqueous secreted to
Posterior chamber
What is the function of ascorbic acid
- potent reducing and antioxidant agent
- fighting bacterial infections
- detoxifying reactions
- formation of collagen in fibrous tissue
What is the aqueous humor made from
Blood
What cells secrete the aqueous humor
The non-pigmented epithelium of the ciliary processes
What the volume of aqueous humor
0.2 microliter
How often is aqueous replaced
Every 100 minutes
What are the 5 main components of the aqueous humor
Bicarbonate Lactic acid Ascorbic acid Chlorides Glucose
T/F there is variation between the aqueous in healthy and diseased eyes
NO
What is the vitreous humor
Dilute solution of salts, soluble proteins, and HA
What is the vitreous contained in
Mesh work of collagen
What is water composition of the vitreous
98.5-99.7%
What is the magnesium composition of the vitreous
???
What is thought to play a significant role in the production and secretion of several connective tissue macromolecules of the vitreous body
Non-pigmented epithelium of the ciliary body
Where is the collagen content of the vitreous the highest
At the base
Next at posterior cortex
Lowest at center
What is the diameter of the collagen fibrils that fill the vitreous body
8-16 mm
T/F the density of the collagen fibril network differs throughout the vitreous
TRUE
What are the types of collagen present in the vitreous
2, 9, 11
What is the order of collagen types present from greatest amount to lease
2>9>11
What is fibrillin
Used to form microfibrils
Minor component of vitreous
What is fibrillin a MAJOR component of
Zonules
