PSY280H1 Chapter Notes -Retinal Pigment Epithelium, Photon, Rhodopsin
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PSY280H1 Full Course Notes
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This is also what happens with nearer objects: astigmatism is due to an irregularly shaped cornea, explain the distribution of ions before, during and after an action potential a. Inhibitory: k+ channels open: neurons usually have receptors for multiple neurotransmitters, the cell body will summate all the signals received via dendrites, neurons fire in the absence of stimuli, called spontaneous activity. In the dark: na+ channels in the outer segment, k+ ions are flowing outward via potassium channels in the inner segment. 3: photoreceptors are depolarized and release excitatory neurotransmitter called glutamate, activated rhodopsin (by light) activates a g-protein, which activates an enzyme, converting cgmp to gmp and closing the sodium channels. It is the process of increase in sensitivity after prolonged exposure to the dark. Sensory receptors are specialized neurons that pick up information from the environment, rather than from other neurons.
