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Related Concept Videos

Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

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At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
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The Retina01:32

The Retina

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The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.
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Anatomy of the Eyeball01:20

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The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle...
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Channel Rhodopsins01:11

Channel Rhodopsins

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Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
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G-Protein Gated Ion Channels01:21

G-Protein Gated Ion Channels

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GPCRs are primarily responsible for our sense of smell, taste, and vision.  The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory...
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Photoreceptors and Plant Responses to Light02:00

Photoreceptors and Plant Responses to Light

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Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
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Related Experiment Video

Updated: Apr 23, 2026

Preparation of Living Isolated Vertebrate Photoreceptor Cells for Fluorescence Imaging
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Preparation of Living Isolated Vertebrate Photoreceptor Cells for Fluorescence Imaging

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Retinal phototransduction.

Gurdeep S Mannu1

  • 1Academic Medicine Department, Norfolk and Norwich University Hospital, Colney Lane, Norwich, Norfolk NR4 7UY, United Kingdom. Tel. +44 (1603) 286286. Fax. +44 (1603) 287211.

Neurosciences (Riyadh, Saudi Arabia)
|October 3, 2014
PubMed
Summary

This review explores how light particles (photons) are converted into electrical signals in the retina, detailing the neurobiology of vision and key molecules involved in this sensory pathway.

Area of Science:

  • Neuroscience
  • Biophysics
  • Molecular Biology

Background:

  • Vision is a critical sense providing extensive environmental information.
  • Retinal information processing begins with photons, the physical form of light.
  • The brain interprets visual input as electrical signals through action potentials.

Purpose of the Study:

  • To review recent advancements in understanding visual transduction.
  • To provide an overview of the molecular mechanisms underlying vision.
  • To explain the conversion of photons to electrical potentials in the retina.

Main Methods:

  • Literature review of recent scientific publications.
  • Synthesis of current knowledge on visual pathways.
  • Identification and summary of key molecules in neurobiology of vision.

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Two Peeling Methods for the Isolation of Photoreceptor Cell Compartments in the Mouse Retina for Protein Analysis
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Two Peeling Methods for the Isolation of Photoreceptor Cell Compartments in the Mouse Retina for Protein Analysis

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Transretinal ERG Recordings from Mouse Retina: Rod and Cone Photoresponses
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Transretinal ERG Recordings from Mouse Retina: Rod and Cone Photoresponses

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Preparation of Living Isolated Vertebrate Photoreceptor Cells for Fluorescence Imaging
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Two Peeling Methods for the Isolation of Photoreceptor Cell Compartments in the Mouse Retina for Protein Analysis
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Transretinal ERG Recordings from Mouse Retina: Rod and Cone Photoresponses
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Main Results:

  • Detailed summary of photon to electrical signal transduction pathways.
  • Overview of the primary molecular players in the neurobiology of vision.
  • Recent advances in understanding the complexity of these pathways.

Conclusions:

  • The neurobiology of vision involves intricate molecular pathways for photon transduction.
  • Understanding these processes is key to comprehending visual perception.
  • Further research continues to elucidate the complexities of the visual system.