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10 Cards in this Set
- Front
- Back
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What is the word that this process describes?
- passive, spontaneous, no energy required passage of small molecules into or out of an area according to a concentration gradient |
diffusion
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What is convective flow and where in the eye may it occur?
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flow of a fluid in response to a heat change - occurs in anterior chamber - this type of flow can eliminate "unstirred effects" - also eliminates waste - if you do not want equilibrium in the fluid then should be separated by endothelium or epithelium
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Both osmotic and oncotic pressure promote the movement of ______ toward the _______ conc of solute/protein
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water, higher
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What is the fx of oral glycerin? Which clinical scenario may you need to administer?
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causes a rapid increase in osmotic pressure in the BS - draws water out of tissues (Including vitreous). May need in closed angle glauc - as water is removed from vitreous, IOP decreases
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ciliary body stroma and aqueous humor contain a HUGE difference in conc of plasma protein. what is responsible for this?
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tight junctions
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epithelial polarity and domains maintained by
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tight juxa
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Name two important properties in the eye that arise because of the Na-K-ATPase pump
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corneal transparency maintenance
aqueous production |
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what is a uniporte?
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used in facilotated diff - integral membrane protein - transfers one solute molecule at a time with a solute gradient
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Beta 1 and 2 receptors do what to aqueous prod?
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increase
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Movement of ions from the pigmented ciliary epithelium to the non pigmented ciliary epithelium occurs through what mech?
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gap jx
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