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Questions and Answers
What is the main function of cones in photopic vision?
What is the main function of cones in photopic vision?
- Regenerating photoreceptor cells
- Sending signals directly to the brain
- Sensing light in the periphery
- Detecting color and providing detailed vision (correct)
What percentage of the brain is dedicated to the 6 million cones?
What percentage of the brain is dedicated to the 6 million cones?
- 50%
- 10%
- 75%
- 25% (correct)
How many photoreceptor cells are there in total in the human retina?
How many photoreceptor cells are there in total in the human retina?
- 150 million
- 126 million (correct)
- 120 million
- 100 million
What is the primary function of rods in scotopic vision?
What is the primary function of rods in scotopic vision?
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What is the ratio of rods to cones in the human retina?
What is the ratio of rods to cones in the human retina?
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Study Notes
Photopic and Scotopic Vision
- Photoreceptor cells consist of rods and cones, responsible for retinal stimulation.
Photoreceptors: Rods and Cones
- Cones are specialized for: • Color vision • Detail vision • Fovea (central part of the retina)
- Rods are sensitive to: • Light • Periphery (outer part of the retina)
Characteristics of Photoreceptors
- Total number of receptors: 126 million
- Rods: 120 million (95%)
- Cones: 6 million (5%)
- Brain allocation: 25% of the brain is dedicated to processing information from 6 million cones.
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Description
This quiz covers the basics of photopic and scotopic vision, including the structure and function of photoreceptor cells, rods and cones, and their role in color vision and light sensitivity.
