PSYC 2390 Study Guide - Midterm Guide: Horseshoe Crab, Myelin, Invertebrate

• School: University of Guelph
• Department: Psychology
• Course: PSYC 2390
• Professor: Lana Trick

Document Summary

Parts of the eye: descriptions/functions/ associated disorders or problems for each part. There"s no way that the light coming in can focus and no cells can register it. Irritating disorder because it causes loss of cones in the fovea. Risk factors: farsighted (hyperopia axial) foreshortened eyeball, oriental eyeball shape. : on the retina there are specific cells that have action potentials that deal with the image focused on the retina. After-images and photoreceptors: *stare at an image for a long period of time, when it is removed you still see the image* The retina summarizes information through the collector cells, because there are not a lot of ganglion cells: horizontal cells, bipolar cells, amacrine cells. The rods and cones just see the absence or presence of light, and pick up the color and can have action potentials. Inhibitory neurotransmitter reduces rate of firing by 1/10th the number of ap/ sec that isolated neuron receives: spatial summation (lateral summation)