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What is When light strikes the eye there is an increase in which of the following? and explain in detail?
Transducin is the G protein activated. by rhodopsin when light strikes the eye. Transducin activates a phosphodiesterase that hydrolyzes cGMP When cGMP concentrations within the rods or cones decrease, sodium channels close, sodium conductance decreases, and the cell membrane potential increases (hyperpolarizes). Hyperpolarization of the cell causes a decrease in the release of neurotransmitter. Eventually the all- trans retinal dissociates from opsin and reduces the concentration of rhodopsin in the cell.