eye shit - There are three dif. Opsins in the cones that...

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There are three dif. Opsins in the cones that give them their sensitivity to the different light Rhodopsin is for rods. 120 million rods in the peripheral retina 5 million cones in the central retina mostly fovea. More disks in the rod make it more sensitive. Cones project to one bipolar to one ganglia cell. Rods converge to a bipolar which all combine to one ganglia. Leads to decrease in acuity for rods. Rods are 1000 times more sensitive. Retina Breaks down incoming images into little pixels Light decreases the release of neurotransmitter into bipolar. Which adjusts release onto ganglion. Allows different amount of ca in and out via voltage gated channel. Horizontal cells and bipolar cells sharpen the connection. In the dark, the channels open and Na goes in, because it is +62. Then it depolarizes. This pops open the Calcium channel. In the light, photoreceptors and closed channels bring Vm to -60. Some Opsin stuff. (transduction)
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This note was uploaded on 04/28/2008 for the course PSY 209 taught by Professor Smith during the Spring '08 term at Vanderbilt.

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eye shit - There are three dif. Opsins in the cones that...

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