Dark and Light Adaptation in Vision
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Questions and Answers

What is the term for the eye's ability to see in a low light environment?

  • Light Adaptation
  • Phototransduction
  • Retinal Adaptation
  • Dark Adaptation (correct)

Which part of the eye converts light energy into electrical impulse?

  • Photoreceptor Cells (correct)
  • RPE
  • Choriocapillaris
  • Bipolar Cells

What is the name for the mechanism of the eye's adaptation to bright light (daylight vision)?

  • Light Adaptation (correct)
  • Retinal Adaptation
  • Dark Adaptation
  • Phototransduction

Which cells connect both rods and cones sideward?

<p>Horizontal Cells (D)</p> Signup and view all the answers

What supplies 80% of the blood to the retina?

<p>Choriocapillaris (C)</p> Signup and view all the answers

What is the main function of dendrites in neurons?

<p>To receive information from other neurons (C)</p> Signup and view all the answers

What triggers the release of glutamate in photoreceptor cells?

<p>Inhibition of voltage gated calcium channels (A)</p> Signup and view all the answers

What is the main function of ganglion cells in the visual system?

<p>To transmit electrical charges to the visual cortex of the brain (A)</p> Signup and view all the answers

What is the role of Horizontal, Muller, and Amacrine cells?

<p>To release GABA in response to glutamate (B)</p> Signup and view all the answers

What happens when light strikes the rods in the mechanism of phototransduction?

<p>Triggering of Phosphodiesterase (PDE) enzyme (B)</p> Signup and view all the answers

Flashcards

Dark Adaptation

The eye's ability to see in low light conditions.

Photoreceptor Cells

Cells in the eye that convert light energy into electrical impulses.

Light Adaptation

The mechanism of adaptation to bright light conditions.

Horizontal Cells

Cells that connect rods and cones laterally in the retina.

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Choriocapillaris

Part of the eye supplying 80% of blood to the retina.

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Dendrites

Parts of neurons that receive information from other neurons.

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Glutamate Release

Triggered by inhibition of voltage-gated calcium channels in photoreceptors.

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Ganglion Cells

Cells that transmit electrical signals to the visual cortex.

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GABA Release

Response of Horizontal, Muller, and Amacrine cells to glutamate.

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Phosphodiesterase (PDE) Activation

Occurs when light strikes rods, beginning phototransduction.

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