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Photoreceptor
rod ;)
Biologically the receptor is what detects the stimulus. The nervous system works in a diagram like this: Stimulus --> Receptor --> Coordinator --> Effector --> Response e.g Hot Pan --> Thermo --> brain --> bicep muscle contracts --> hand moves away On Hand receptor from pan. In skin.
one and three fouths
Transduction occurs in the cones.
Rods
The eye, specifically rods and cones.
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Rods are photoreceptors found on the retina of the eye. They do not detect colour but detect variations in the amounts of light allowing you to see shades of colour and to develop adaptive night vision.
The human eye can detect around 10 million different colors, but it's difficult to say exactly how many shades of green specifically can be visualized. Green is a primary color in the visible spectrum, so the human eye can perceive a wide range of green shades based on the varying levels of light and pigmentation.
A specialized nerve cell that is designed to respond to a specific sensory stimulus. Mechanoreceptors detect mechanical compression or stretching of the receptor or of tissues adjacent to the receptor. Thermoreceptors detect changes in temperature. Nociceptors detect damage in tissues. E electromagnetic receptor detect light on the cornea of the eye. Chemoreceptors detect taste in the mouth, smell in the nose, oxygen level in the arterial blood, osmolality of the body fluids, and carbon dioxide concentration.
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visual receptor for the brain
If you mean, "which wavelengths of light can the human eye detect," the human eye can see wavelengths from about 390 to 700 nanometers.
The spectrum that our eye had receptor is visible and the invisible is just purely out of our receptor range.
Retina
Photoreceptor