Answer:
Sensory transduction in the human eye triggered by light causes hyperpolarization, the hydrolysis of cGMP, and the closing of Na channels.
Step-by-step explanation:
Light striking the photo pigments in the eye decomposes rhodopsin (which is a pigment-containing sensory protein that converts light into an electrical signal), leading to a decrease in the rod membrane conductance for Na in the outer segment of the rod (rods are photoreceptor cells in the retina of the eye). This change causes hyperpolarization of the entire rod membrane. Light triggers a decrease in the cGMP concentration, leading to the closure of the cGMP-gated Na channels in the plasma membrane and the consequent reduction in the circulating current of the cell.