are receptor cells contained in the retina and are useful in low-light conditions.

Question

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The prompt asks us to fill in the blank in the statement: 'are receptor cells contained in the retina and are useful in low-light conditions.'
Option available: 空白1, which corresponds to the blank to be filled.
First, consider the nature of receptor cells in the retina. There are two main types: rods and cones. Rods are highly sensitive to light and enable vision in dim conditions, making them essential for scotopic (low-light) vision. They are distributed more densely around the periphery of the retina and can detect motion and general shapes when illumination is poor.
In contrast, cones require brighter light (photopic conditions) and are responsible for color vision and high-acuity detail, primarily in the central retina (fovea). This distinction helps explain why the statement about low-light usefulness points to rods rather than cones.
Therefore, the blank should be filled with 'rods' to correctly describe the receptor cells that operate in low-light environments.
Note on options: since only one option is presented (空白1), there isn’t an alternative choice to compare. The reasoning hinges on the known functional specialization of rods versus cones, aligning with the description of low-light usefulness.

are receptor cells contained in the retina and are useful in low-light conditions.

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Question at position 13 Which of the followings statements is true of the rods in the eye's retina?They are insensitive to light.They are very useful for color vision.They are found in the fovea.They require a smaller amount of light to respond than the cones do.

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