Final answer:
Transduction in the visual system occurs in the retina, where photoreceptive cells convert light into electrical signals that are transmitted to the brain through the optic nerve. The correct option is a. Retina
Step-by-step explanation:
Transduction in the visual system takes place in the retina. The retina contains photoreceptive cells, which are responsible for converting light into nervous impulses.
When light enters the eye, it first passes through the cornea and lens, which help to focus the image, and then reaches the retina located on the inner surface of the back of the eye.
The densest concentration of photoreceptor cells is found in the fovea, a part of the retina that provides high spatial resolution for visual acuity.
It is important to note that the optic nerve, comprised of axons from the retinal ganglion cells, is what carries the visual information from the retina to the brain but does not participate in transduction itself. The correct option is a. Retina