PSY-B - Psychology PSY-B 320 Study Guide - Midterm Guide: Hair Cell, Enkephalin, Tonotopy
27 Jan 2017
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Sensation: the stimuli that acts on a system. Vision: define and give the relationship between sensation and perception, know the stimulus properties of light and the response features of rods and cones. Cones: color, high threshold, small in fovea, large outside fovea, continuous response. Rods: low illumination, movement, low threshold, no color, more plentiful, convergence: structure of the eye and its role in light gathering and focus on retina, cellular structure of the retina and how they are hooked up . Lens: 42 refractor, rounds to bend light for near objects by ciliary muscle (contracted ring) Retina: from cns, rods and cones, fovea central point. Dark: cgmp-gated sodium channels, na bind to channels; na moves in when open (depolarizing) Light: light absorption breaks down cgmp into gmp to hyperpolarize (stop release glu) Light hits cell and causes hyperpolarization, stopping release of glutamate. Removal of inhibitory nt causes excitatory response in bipolar.
