The human eye - Processing of light - Photoreceptors transduce light into electrical signals

5 important questions on The human eye - Processing of light - Photoreceptors transduce light into electrical signals

What are the functions of the rod photoreceptor type?

Rods are for:
  • low light
  • night vision
  • black & white

What are the functions of the Cone photoreceptor type?

Cones are for:
  • High light, high-acuity vison
  • Daytime
  • Colour

What is the structure of a photoreceptor?

Outer segment whose tip touches the outer side of the retina:
  • Deep folded cell membranes
  • Rods or Cones

Inner segment tha contains the cell nucleus and organelles
Basal segment with a synaptic terminal that realeses glutamate n bipolar cells.
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What is visual pigment?

Visual pigments are transducers that convert light energy into a change in membrane potential.

How many types of visual pigment does a cone photoreceptor have?

Three, they areclosely related to rhodopsin. The eye has cones for red, green and blue.

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