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20 Cards in this Set
- Front
- Back
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The following are describes the people except A. More nasally located B. Rest on anterior surface of lens C. Response to light and accommodation D. Good physical landmark a iris |
D. A good landmark could be collarette |
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Why is there no epithelium on the anterior surface of the iris |
To allow aqueous humor to freely permeate into iris stroma |
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In mydriasis where does a fold form? |
At the collarette |
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What are layers of the iris? |
All iris’ act powerful. Anterior border layer Iris stroma anterior myoepithelium poster pigmented epi |
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Iris color is determined by type and amount of melanin in which layer of the iris |
ABL |
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The less melanin pigment that is present in the ABL the deeper |
Blue the iris appears |
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Laser photoablation is used on Anterior border layer to |
Lighten the iris while taking pigment out of the ABL causes dystrophy if iris |
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Under atrophy the Iris is not expected to go from A. Pale blue too deep blue B. Brown to green D. Hazel to grey blue E. Green to brown |
E. Brown to green!! |
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The iris sphincter exist solely within what part of the iris |
Pupillary margin |
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The numerous vasculature of the iris resides from |
Major Circle a iris |
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True or false. vessels in the iris run radially towards the pupil |
True |
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Venous vessels of the Iris return to which two types of veins |
Vortex veins anterior ciliary veins |
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Which vessel layer makes the vessel in the iris appear as a tube within a tube? |
Tunica adventitia |
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The tunica media you see very few ____and mostly_____ |
Smooth muscle cells, pericytes |
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What type of junctions are found at interendothelial junctions of iris vessels(2) |
Tight junctions an adherens |
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True or false. Interendothelial junctions allow leaking a plasma proteins into the aq that penetrates the stroma |
False. Tight junctions and adherens Do not allow proteins to go through |
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Front (Term) |
Apex to apex: AME layer and PPE layer. Joined via gap junctions and Desmosomes |
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Aqueous humor produced in the posterior chamber must pass through what to reach the anterior chamber |
Pupil |
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Which type junctions ring each posterior pigmented epithelium cell on the apical lateral surfaces |
Adherens and zonula Occludentes (tight) |
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What is something the PPE and AME share? |
Melanin pigment granules called a melanosomes |
