A unique feature of the retinal circuitry is that
a. there are more cones than rods in the retina.
b. light must pass through the circuitry in order to stimulate the photoreceptors.
c. the rods are packed together at the center of the retina.
d. rods send signals through cones, which then activate the ganglion cells.
e. photoreceptors do not influence the activity of surrounding nerve cells.
Answer: b. light must pass through the circuitry in order to stimulate the photoreceptors.
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