In bright-light conditions, which receptors are more important for vision?

Question

BlackTom AI · Accepted Answer

When considering vision under bright-light conditions, the system relies on different photoreceptors than in dim light.
Option 1: Cones. In bright light, cones are the primary photoreceptors responsible for high-acuity and color vision. They have high illumination tolerance and provide sharp, detailed vision, which is why this option aligns with daytime vision.
Option 2: Ganglion cells. Ganglion cells are the output neurons of the retina; they transmit signals from photoreceptors via bipolar and amacrine cells to the brain. While essential for vision, they are not the primary receptors activated by bright light themselves, so this choice is misleading as the description.
Option 3: Rods. Rods are highly sensitive to low light and mediate scotopic (night) vision, with high sensitivity but low acuity and no color discrimination. They contribute little to vision in bright daylight, making this option incorrect for bright-light conditions.
Option 4: Bipolar cells. Bipolar cells serve as interneurons transmitting signals from photoreceptors to ganglion cells. They are involved in the retinal processing pipeline but are not the photoreceptors themselves, and the question targets the receptors most important in bright light, so this choice does not address the primary receptor type.
In summary, the key distinction is between photoreceptors themselves versus downstream retinal neurons, and among photoreceptors, cones are specialized for high-light, high-acuity, color vision, which is why they’re the correct emphasis in bright conditions.

In bright-light conditions, which receptors are more important for vision?

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