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(A) The mechanism of vision follows these steps:$1$. Light rays in the visible wavelength focus on the retina through the cornea and lens.$2$. This li

Vedclass · Accepted Answer

Light falls on retina $\rightarrow$ Dissociation of retinal from opsin $\rightarrow$ Change in membrane permeability $\rightarrow$ Depolarization of photoreceptor cells $\rightarrow$ Optic nerve $\rightarrow$ Visual cortex

Vedclass · Answer

(A) The mechanism of vision follows these steps:$1$. Light rays in the visible wavelength focus on the retina through the cornea and lens.$2$. This light causes the dissociation of retinal (an aldehyde of vitamin $A$) from opsin (a protein).$3$. This structural change in opsin leads to a change in the membrane permeability of the photoreceptor cells.$4$. This results in the generation of potential differences (depolarization) in the photoreceptor cells.$5$. This generates action potentials in the ganglion cells through the bipolar cells.$6$. These impulses are transmitted by the optic nerves to the visual cortex area of the brain,where the neural impulses are analyzed and the image is recognized.

Select the correct option for the mechanism of vision.

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