1016MSC Study Guide - Final Guide: Endolymph, Ototoxicity, Growth Hormone–Releasing Hormone
29 Jul 2018
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In between cornea and lens: some drained via canal of schlemm, vitreous humour, fills posterior chamber of eye, holds neural layer firmly against pigmented layer, formed in embryonic development, and lasts for lifetime. Inferior oblique- passes underneath eye and attaches to lateral aspect of eye, for looking up when eye is adducted; innervated by oculomotor. Photoreception: excitation of cones, three types of cones- red, green, blue, excitation of rods, when struck by light, rhodopsin breaks down and retinal becomes all trans retinal. In dark phase, cis retinal regenerated via an enzyme and recombines with opsin to become rhodopsin (you need vitamin a for this to happen) Phototransduction- light: photoreceptor, light hits the retina, 11 cis retinal converted to all trans retinal, cation ion channels close, photoreceptor is hyperpolarised, cal(cid:272)iu(cid:373) (cid:272)ha(cid:374)(cid:374)els do(cid:374)"t ope(cid:374, no exocytosis of neurotransmitter. Ipsp not produced: bipolar cells, because no ipsp, bipolar cells disinhibited, ap propagated down, ganglion cells, stimulated, ap produced.
