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Retinal cones

retinal cone

(Science: ophthalmology, physiology) One of the two photoreceptor cell types in the vertebrate retina.

In cones the photopigment is in invaginations of the cell membrane of the outer segment. Cones are less sensitive to light than rods, and are differentially sensitive to particular wavelengths of light and therefore important for colour vision.

They provide vision with higher spatial and temporal acuity, and it is the combination of signals from cones with different pigments that facilitates colour vision. There are three types of cones, each type sensitive to red, green or blue. Present in large numbers in the fovea.

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Light-dependent Reaction Questions

... biology: if you've ever taken human physiology, you will know that the cones in the eye have three different proteins for red, blue and red, but all three are bound to the same retinal molecule. because the retinal is in a different environemnt(surrounded by different ...

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by MrMistery
Sat Dec 06, 2008 3:18 pm
Forum: Botany Discussion
Topic: Light-dependent Reaction Questions
Replies: 3
Views: 7335

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