Vision Sense organs eye Receptor cell photoreceptor Receptor

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Vision Sense organs: eye Receptor cell: photoreceptor Receptor signal transduction mechanism: activated opsin membrane

Vision Sense organs: eye Receptor cell: photoreceptor Receptor signal transduction mechanism: activated opsin membrane receptor (transducin G-protein) activates c. GMP path to hyperpolarization in light Pathway of conduction: photoreceptor bipolar cell ganglion cell (as optic nerve) thalamus visual cortex visual assoc. area

Information passes from retinal photoreceptor cells to bipolar neurons to ganglion neurons. (There is

Information passes from retinal photoreceptor cells to bipolar neurons to ganglion neurons. (There is some convergence. ) photoreceptors

http: //www. blackwellscience. com/matthews/rhodopsin. html http: //www. webvision. med. utah. edu/movies/trasduc. mov

http: //www. blackwellscience. com/matthews/rhodopsin. html http: //www. webvision. med. utah. edu/movies/trasduc. mov

What effect would a decrease in phosphodiesterase activity in photoreceptor cells have on vision?

What effect would a decrease in phosphodiesterase activity in photoreceptor cells have on vision? A decrease in phosphodiesterase activity would lead to a higher level of intracellular c. GMP. This rise would, in turn, keep the gated cation channels open and keep the photoreceptors depolarized. This would decrease the ability of receptor neurons to respond to photons. And reduce the receipt of visual sensory information.

Vision Pathway of conduction: photoreceptor bipolar cell ganglion cell (as optic nerve) thalamus visual

Vision Pathway of conduction: photoreceptor bipolar cell ganglion cell (as optic nerve) thalamus visual cortex visual assoc. area

‘Shortsighted’ or ‘Near-sighted’ ‘Farsighted’ http: //www. clinicareinoso. com/conditns/refract. htm

‘Shortsighted’ or ‘Near-sighted’ ‘Farsighted’ http: //www. clinicareinoso. com/conditns/refract. htm

Eye Muscles Superior Oblique (IV) Lateral Rectus (VI) All others (CN III) Inferior Rectus

Eye Muscles Superior Oblique (IV) Lateral Rectus (VI) All others (CN III) Inferior Rectus Medial Rectus, Superior rectus Inferior Oblique • Eye Lid: Levator Palpebrae

Sense Organs Sense Organs Sense organs contain aSense Organs Sense Organs Sense organs contain a
Aesthesiology Sense organs Sense organs include 1 EyeAesthesiology Sense organs Sense organs include 1 Eye
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THE SENSE ORGANS AND ITS PARTS SENSE ORGANSTHE SENSE ORGANS AND ITS PARTS SENSE ORGANS
Our Sense Organs Our sense organs and theirOur Sense Organs Our sense organs and their
THE SENSE ORGANS Sense Organ A Sense OrganTHE SENSE ORGANS Sense Organ A Sense Organ
Part Sensory Organs The Sensory Organs Sensory organsPart Sensory Organs The Sensory Organs Sensory organs
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Specific learning objectives Functional anatomy of eye PhotoreceptorSpecific learning objectives Functional anatomy of eye Photoreceptor
Specific learning objectives Functional anatomy of eye PhotoreceptorSpecific learning objectives Functional anatomy of eye Photoreceptor
Senses Organs By Pamela Yugsi SENSE ORGANS OurSenses Organs By Pamela Yugsi SENSE ORGANS Our