出典:Wikipedia
出典:『Wikipedia』 (2011/07/07 15:25 UTC 版)
A photoreceptor cell is a specialized type of neuron found in the eye's retina that is capable of phototransduction. The great biological importance of photoreceptors is that they convert light (electromagnetic radiation) into signals that can stimulate biological processes. More specifically, photoreceptor proteins in the cell absorb photons, triggering a change in the cell's membrane potential.