Unformatted text preview: r opposite is true for ON bipolar cells. o ON-and OFF-bipolar cells h Photoreceptor releases glutamate when depolarized h OFF-bipolar cells have ionotropic glutamate receptors (AMPA + kainate). Glutamate depolarizes them. h ON-bipolar cells have G-protein coupled metabotropic receptors (mGLUR6). Glutamate hyperpolarizes them. glutamate mGluR6 AMPA kainate glutamate AMPA kainate NMDA N A dark spot in the center has the opposite effect e...
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- Spring '08