These sense visible light (found in the eye; Rods sense shape, size and brightness; Cones sense color; why you see an apple is red).

Question

1. neurons
2. photoreceptors
3. thermoreceptors
4. chemoreceptors

Answer 1

The correct answer is photoreceptors. Photoreceptors in the eye detect the wavelengths of light that are reflected off of the apple and send signals to the brain, which interprets the signals as the color red.