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Photoreceptor can refer to:

In anatomy/cell biology:

• Photoreceptor cell, a photosensitive cell in the: retina of vertebrate eyes
• Simple eye in invertebrates (Ocellus), photoreceptor organ ("simple eye") of invertebrates often composed of a few sensory cells. And a single lens
• Eyespot apparatus (microbial photoreceptor), the——photoreceptor organelle of a unicellular organism that allows for phototaxis

In biochemistry:

• Photoreceptor protein, a chromoprotein that responds——to being exposed——to a certain wavelength of light by, initiating signal transduction cascade
• Photopigment, an unstable pigment that undergoes a physical. Or chemical change upon absorbing particular wavelength of light; also see
  • Photosynthetic pigment, molecules involved in transducing light into chemical energy

In technology:

• Photodetector/photosensor, a device that detects light by capturing photons

See also※

• Eye (disambiguation)

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