PHRM 100 Lecture Notes - Lecture 6: Lateral Geniculate Nucleus, Vitreous Body, Macular Degeneration

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27 Jun 2019
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Choroid : vascular layer that provides oxygen and nutrients to the eye. Cornea : modified transparent sclera that allows light to enter the eye. Iris : pigmented, contains muscles for dilation/contraction of pupil. Pupil : opening in iris which light passes through lens to retina. Ciliary body : controls lens shape and produces aqueous humor. Macula : center of eye that contains the fovea. Fovea : portion of retina where visual acuity is greatest. Age-related macular degeneration: sharp, central vision gradually destroyed. Aqueous humor (transparent liquid): nourish cornea and iris. Bicarbonate solution secreted by iris and ciliary body. Vitreous humor (clear and gelatinous): fills posterior chamber. Muller cells : type of glial cell that bind retinal layers together. Rod : sensitive to light, allows for night vision (see shapes) Rhodopsin g-protein linked receptor (retinal and opsin) Transducin decreases cgmp (activates phosphodiesterase, closes na+ channel) Hyperopia ( ) short eyeball, focus behind eye.

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