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Cone cell

Cone cell --> 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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Retina and fetus

... of the retina marked as letters. That's what I have: a - ganglion cell b - bipolar cell c - cone cell d - rod cell But I don't have even a slightest guess with e and f.. could you help ...

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by Juggler
Wed Oct 05, 2011 5:02 pm
 
Forum: General Discussion
Topic: Retina and fetus
Replies: 2
Views: 2826

Re: Evolution of sexual reproduction

... ยป Thu Aug 19, 2010 2:57 pm The mutation doesn't have to happen in a sex cell, just in the lineage of the sex cell, which means a lot of embryonic ... top and diversifies down to species level. The so-called "inverted cone of diversity." As stated above, the fossil record shows a hierarchical ...

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by jevg
Mon Aug 23, 2010 10:03 pm
 
Forum: Evolution
Topic: Evolution of sexual reproduction
Replies: 29
Views: 32205

Investigation of neurons

... spinal cord. The time at which the neural precursors withdraw from the cell cycle and differentiate also determines the signals received by the ... motor neurons need to form connections with their target cells. Growth cones at the tip of the growing axons are specialised structures which move ...

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by inayat
Wed Sep 10, 2008 7:53 pm
 
Forum: Molecular Biology
Topic: Investigation of neurons
Replies: 0
Views: 2549

Are tissues in the body capable of sensing pain?

... adaptation of the eye to light. the darkness causes all the retinen in cone cells to associate with its opsin partner, leading to an increased sensitivity of the cell ...

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by MrMistery
Thu Jan 10, 2008 6:42 pm
 
Forum: Human Biology
Topic: Are tissues in the body capable of sensing pain?
Replies: 24
Views: 14333

"Twenty questions"-biology game

probably either a rod cell or a cone cell...

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by MrMistery
Wed Sep 19, 2007 9:07 am
 
Forum: General Discussion
Topic: "Twenty questions"-biology game
Replies: 771
Views: 338331
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