National League for Nursing (NLN PAX) Practice Exam

Question: 1 / 495

Where are light-sensitive cells called rods and cones found in the eye?

Cornea

Retina

Rods and cones, the light-sensitive cells responsible for vision, are located in the retina of the eye. The retina is the inner layer at the back of the eye that contains these photoreceptor cells. Rods are primarily responsible for vision in low light conditions and do not detect color, while cones are responsible for color vision and function best in bright light. This arrangement allows the retina to convert light into electrical impulses, which are then sent to the brain for processing, enabling us to perceive images.

The other parts of the eye mentioned have different functions. The cornea is the transparent front part of the eye that helps to focus light, the sclera provides structure and protection, and the choroid is a layer containing blood vessels that nourish the retina and contains pigment to absorb excess light. None of these structures houses the light-sensitive cells crucial for vision.

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Sclera

Choroid

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