Question

Foveal cones provide greater visual acuity than rods because _____.

a. there are more cones than rods
b. each cone is typically connected to only one bipolar cell
c. cones are larger than rods
d. the cones shape enhances the encoding of a wider variety of detail

Answer 1

Foveal cones offer greater visual acuity than rods due to each cone's individual connection to a single bipolar cell, which enables detailed visual processing and contributes to the sharpness of vision in the foveal region of the retina.

Step-by-step explanation:

Foveal cones provide greater visual acuity than rods because each cone is typically connected to only one bipolar cell. This direct connection allows for a high degree of detail to be transmitted because each cone can independently contribute to the image processing, thereby enhancing the sharpness of vision. In contrast, rods, which are more prevalent in the periphery of the retina, share their connections with multiple cones, diminishing the precision of visual information. Additionally, visual acuity is greatest at the fovea because this region lacks supporting cells and blood vessels that could potentially absorb incoming light, ensuring minimal interference with the photoreceptors' ability to detect light.