A high concentration of what cell is found in the fovea centralis of the eye?

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BlackTom AI · Accepted Answer

Starting with the topic of the fovea centralis, a small area of the retina specialized for high-resolution vision, the main cell type densely packed there are cones, which are responsible for color vision and sharp central vision.
Option 1: rods. These photoreceptors are abundant in the peripheral retina and are highly sensitive to light, which makes them suited for low-light vision, not for the high acuity required in the fovea.
Option 2: ganglion cells. While ganglion cells receive input from photoreceptors and their axons form the optic nerve, they are not the primary cell type concentrated in the fovea; their cell bodies are distributed more broadly and their density does not define the fovea’s function.
Option 3: cones. This is the correct focus for the fovea centralis, as the fovea is densely packed with cone photoreceptors, enabling high visual acuity and color discrimination at the center of the visual field.
Option 4: photoreceptors. While cones are a type of photoreceptor, the broader category includes rods as well; stating photoreceptors generally does not specify the specialized high-acuity region of the fovea, making this description too broad for pinpointing cell concentration.
Option 5: optic nerve fibres. The optic nerve carries signals out of the eye rather than constituting the retinal cell population; it is not what is densely concentrated in the fovea itself and does not reflect the photoreceptor composition there.

9808 2025年冬季布鲁斯密集课程练习测验：实验考试 1

A high concentration of what cell is found in the fovea centralis of the eye?

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