In the mammalian eye, the 'fovea' is the center of the visual field where:
Correct answer: C. High density of cones occurs, but it has no rods
- A. Only rods are present
- B. More rods than cones are found
- C. High density of cones occurs, but it has no rods
- D. An equal number of rods and cones
Explanation
The fovea is the part of the retina with the highest concentration of cones, responsible for sharp central vision and color perception. Since cones are primarily used for detailed vision in bright light, the fovea has no rods, which are responsible for vision in low light conditions.
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Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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