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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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Color Vision01:24

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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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Malpighian tubules are specialized structures found in the digestive systems of many arthropods, including most insects, that handle excretion and osmoregulation. The tubules are typically arranged in pairs and have a convoluted structure that increases their surface area.
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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.
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Related Experiment Video

Updated: Aug 29, 2025

Determination of Photoreceptor Cell Spectral Sensitivity in an Insect Model from In Vivo Intracellular Recordings
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Colour vision in nocturnal insects.

Eric Warrant1, Hema Somanathan2

  • 1Department of Biology, University of Lund, Sölvegatan 35, 22362 Lund, Sweden.

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
|September 4, 2022
PubMed
Summary
This summary is machine-generated.

Nocturnal animals, like the elephant hawk moth, possess color vision despite dim light challenges. This ability is crucial for nocturnal pollination but threatened by light pollution.

Keywords:
beecolour visionhawk mothinsectlight pollutionnocturnal vision

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Area of Science:

  • Animal behavior
  • Sensory biology
  • Ecology

Background:

  • Nocturnal color vision is rare, documented in few species like moths, bees, geckos, and anurans.
  • Vertebrates face significant challenges in achieving adequate signal-to-noise ratios for color discrimination in low light.
  • Nocturnal insects exhibit unique optical and neural adaptations for reliable color vision even in starlight.

Purpose of the Study:

  • To describe the nocturnal light environment and its visual challenges.
  • To investigate adaptations for nocturnal color vision in insects, using *Deilephila elpenor* as a model.
  • To explain the advantages of nocturnal color vision for insects, particularly pollinators.

Main Methods:

  • Analysis of the visual light environment at night.
  • Study of optical and neural adaptations in *Deilephila elpenor*.
  • Examination of the role of color vision in nocturnal flower discrimination and pollination.

Main Results:

  • Nocturnal insects possess adaptations for color vision and constancy in low light.
  • Color vision aids nocturnal insects in discriminating night-blooming flowers.
  • Nocturnal pollination is a vital ecosystem service.

Conclusions:

  • Color vision is likely widespread among nocturnal insects, especially pollinators.
  • Anthropogenic light pollution threatens nocturnal color vision and pollination.
  • Understanding nocturnal color vision is crucial for conservation efforts.