Definitions for "Photoreceptor"
Related Terms:
Photoreceptors, Rods, Cones, Cone , Cone cells, Rod, Rhodopsin, Retina, Rod cells, Tapetum lucidum, Rod cell, Ommatidium, Averted vision, Scotopic vision, Eyespot, Photopic vision, Compound eye, Retinal, Blind spot, Opsin, Compound eyes, Retinal, Eyecup, Scotopic, Macula, Floaters, Electroretinogram, Red eye, Cone cell, Fovea, Optic disk, Eyes, Central vision, Ora serrata, Googly eyes, Pupil, Photopic, Light adaptation, Naked eye, Walleye, Bipolar cells, Ophthalmoscopy, Slit lamp, Night vision, Floater, Red-eye, Tapetum, Optic, Fixation
an element of the retina, which passes an electrical signal on to a neuron of the optic nerve head, depending upon the amount of light it recieves.
A specialized nerve ending, such as a rod or cone cell in the retina of the eye, that is sensitive to light.
One of the visual pigment-filled light-sensitive cells at the back of the retina, whether rods or cones.
A mechanism that emits an electrical or chemical signal that varies in proportion to the amount of light that strikes it. CCD (charge-coupled device) sensors in desktop scanners and digital cameras, PMT (photomultiplier tubes) in drum scanners, and the rods and cones in the human retina are all photoreceptors.
The cone and rod shaped neurons that cover the retina of the eye. photoreceptors are excited by visible wavelengths, then send signals to the brain where the sensation of color is perceived.
phos = light + L. recipio = I receive; bastard term for light-sensitive cells in retina.
Cells specialized for receiving light.
A nerve end- organ or receptor sensitive to light.
(1) A protein (pigment) that triggers a physiological response when it absorbs a photon. (2) A cell that senses and responds to light energy.
a sensory cell or group of cells which responds to light. Usually containing a pigment which changes chemically when exposed to light, triggering a nerve response.
In plants, a molecule that detects light by undergoing a chemical change when light hits it.
Receptor cell specialized to respond to light energy
a specialized form of cell (specifically, neuron ) that is capable of phototransduction
One of the 125 million nerve cells in the retina of each eye that emit electrical signals when activated by light of a particular wavelength. There are two types of photoreceptor cells in vertebrates: rods, used in low light, and cones, which respond in brighter light and to color.
A light-sensitive cell.
a molecule or structure that can detect light.
Sensory structure that detects changes in light levels
A light sensitive neuron. Photoreceptors interact with light which produces changes in their electrical properties which are communicated to other neurons. They constitute the first stage in the physiological process which underlies vision. The human retina, like the retina of most vertebrates, contains two broad classes of photo-receptors, rods and cones.
a nerve ending, cell, or group of cells specialized to sense or receive light. In the eye there are two types of photoreceptors - Rods and Cones.
The retina in the back of the eye contains two major types of photoreceptors, cones and rods, which are sensitive to electromagnetic radiation having wavelengths from about 380 to 760 nanometers (nm). The cones are contained primarily in the central region of the retina and are chiefly responsible for the excellent visual acuity and color vision characterizing the normal eye during daytime levels of illumination. The cone system has its peak sensitivity at a wavelength of 555 nn and lower sensitivity at both shorter and longer wavelengths. The rods, contained primarily in the more peripheral regions of the retina, are responsible for mediating vision at low light levels (i.e., night vision). The very central region of the retina is devoid of rods and contains only cones.
Photoreceptor is nerve ending, cell, or group of cells specialized to sense or receive light.
A photoreceptor, or photoreceptor cell, is a specialized type of neuron found in the eye's retina that is capable of phototransduction. More specfically, the photoreceptor sends signals to other neurons by a change in its membrane potential when it absorbs photons. Eventually, this information will be used by the visual system to form a complete representation of the visual world.