Sentences with phrase «called rod cells»
Experiments on cells from frogs have shown that sensitive light - detecting cells in vertebrate eyes, called rod cells, do fire in response to single photons.
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The light - receptive cells that an armadillo does have, called rods, are so sensitive that daylight renders the nocturnal animals practically blind.
Rods excite a neuron called a horizontal cell, which then inhibits the ultraviolet cones.
Whether it's stuffing DNA inside the nucleus or cramming energy - generating machinery into the rod - shape organelles called mitochondria, biology separates tasks into specialized compartments within cells to make it easier to do specific jobs without interference.
A healthy retina usually features light - sensitive cells — photoreceptors — called cones and rods.
Rod and cone cells in the human retina contain proteins called opsins that change shape when light strikes them.
Inside cells there are tiny motor engines that ride on thin rods called microtubules.
Retinitis pigmentosa is an inherited retinal degenerative disease that causes slow but progressive vision loss due to a gradual loss of the light - sensitive retinal cells called rods and cones.
Behind the photoreceptors is another layer of cells called retinal pigment epithelium (RPE), which support the rods and cones by delivering nutrients from the bloodstream and removing waste that the rods and cones generate.
The macula is densely packed with photoreceptor cells called rods and cones that react to light and send electrical nerve impulses to the optic nerve and into the brain.
Not so a cell, which maintains shape via rods of filamentous proteins called «actins.»
Vision in low light is dependent on retinal cells called rods.
Rocky Mountain spotted fever, also spread by contact with ticks, is caused by a different kind of bacteria called a rickettsia, which is rod - shaped and multiplies only within the cells of its host.
The retinal cells that help us see in bright light are called cones, and these are not destroyed by the disease itself, but by the toxic by - products released by the rod cells as they die.