When struck by light energy, cones and rods in the retina generate neural signals that then activate the

When struck by light energy, cones and rods in the retina generate neural signals that then activate the

(A) parietal lobe

(B) ganglion cells

(C) bipolar cells

(D) ciliary muscle

(E) optic nerve fibers

Answer: (E) optic nerve fibers

Striking the photoreceptor cells (rods and cones) with light signals in the retina of the eye prompts a chemical and electro-chemical response that generates neural signals. These impulses therefore take the form of light waves which are sensed by the cones and rods which are the final output neurons of the retina. Axons of the ganglion cells further combine and form optic nerve fibers transmitting the information from the retina to the brain for further processing. The fiber of the optic nerves are spread out to the back of the eye from where they depart and send the neural signals which represent the visual information to the specific parts of the brain responsible for vision and visual perception. In other words, let a light energy to make rods and cones in the retina get active, keeping in mind of that the neural signals will the activate the optic nerve fibers and relay this information to the brain .


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