retina
light-sensitive membrane of the eye that receives images
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
retina The inner, light-sensitive layer of the eye; includes the rods and cones.
retina
(reh-tin-uh) [L. dim. of rete, net]
The innermost layer of the vertebrate eye, containing photoreceptor cells (rods and cones) and neurons; transmits images formed by the lens to the brain via the optic nerve.
retinal ...
Retina Proper."The nervous structures of the retina proper are supported by a series of nonnervous or sustentacular fibers, and, when examined microscopically by means of sections made perpendicularly to the surface of the retina, ...
Retinal The prosthetic group of rhodopsin that, upon absorbing light, undergoes an isomerization from 11-cis-retinal to all-trans-retinal, initiating the visual signal transduction pathway.
[edit] Retina
Main article: Retina
The retina consists of a large number of photoreceptor cells which contain a particular protein molecule called an opsin. In humans, there are two types of opsins, rod opsins and cone opsins.
Retina
Retinitis (Chorioretinitis, Cytomegalovirus retinitis) Â- Retinal detachment Â- Retinoschisis Â- Ocular ischemic syndrome/Central retinal vein occlusion Â- Retinopathy (Bietti's crystalline dystrophy, Coats disease, Diabetic retinopathy, ...
Retinal consists of a system of alternating single and double bonds. In the dark, the hydrogen atoms attached to the #11 and #12 carbon atoms of retinal (red arrows) point in the same direction producing a kink in the molecule.
retina The posterior sensory membrane of the eye that receives images.
retrofection Process of reinfection, whereby juvenile nematodes hatch on the skin and reenter the body before molting to third-stage larvae.
The Retina of a heterozygous (Xx) female will have some cells with the "X" inactivated and other cells with the "x" inactivated.
Retinitis pigmentosa -- group of hereditary ocular disorders with progressive retinal degeneration. Autosomal dominant, autosomal recessive, and x-linked forms. Retinoblastoma -- a childhood malignant cancer of the retina of the eye.
Reggie-1 and reggie-2 are two evolutionarily highly conserved proteins which are up-regulated in retinal ganglion cells during regeneration of lesioned axons in the goldfish optic nerve.
The conclusion that might be drawn from the above is that there are many features of ancestral retinal anatomy that were retained in most classes of vertebrates, but lost in mammals. Elaborate color vision is just one such feature.
Why did you use goldfish retina?
It's one of the few places where a presynaptic terminal can be prepared in isolation. Because normally, presynaptic terminals are stuck to the postsynaptic side of the synapse; they're extremely close together.
(Science: microscopy) light is radiant energy of such wavelength that, falling on the retina, it stimulates the rods and cones of the eye and produces the sensation of vision.
cDNA libraries from human retinal pigment epithelium, retina, kidney, fetal brain, and whole fetus.
Microdissection technology and protocols.
Chromosome 17 radiation hybrid panel.
Four chromosome 17q somatic cell hybrids.
Purple pigments, known as retinal (a pigment also found in the human eye) act similar to chlorophyll.
As you read the exam the photoreceptors in your retina will be stimulating the sensory neurons of your optic nerve (a cranial nerve which is part of your PNS).
The lens of your eye focuses the light onto a special tissue called the retina. The retina is lined with special photoreceptors called rods and cones. Rods are more sensitive to light, but cannot distinguish between colors.
Lens the clear structure‚ behind the iris and pupil‚ that focuses the light on the retina
(lens = lentil - because of its shape)
Leukocyte white blood cells
(leuco = white; cyto = cell) ...
 See also: Trans, Cells, Human, Organ, Action
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