Question detail
What happens to the optic nerve when light hits the retina?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
The human nervous system
Question
- A. It contracts
- B. It sends impulses to the brain
- C. It refracts light
- D. It expands
Answer
The correct option is It sends impulses to the brain. This answer is correct because it matches the approved learning objective to describe the optic nerve as the structure that carries impulses from the eye to the brain in the subtopic The eye (biology only).
Explanation
The correct option is It sends impulses to the brain. It sends impulses to the brain is correct because it directly supports the approved learning objective to describe the optic nerve as the structure that carries impulses from the eye to the brain. This belongs to the subtopic The eye (biology only) within The human nervous system, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from The eye (biology only).
Common mistake
Misunderstanding the Function of the Optic Nerve
Students often confuse the optic nerve with other parts of the eye, thinking it is responsible for focusing light rather than transmitting visual information.
Remember that the optic nerve's primary role is to carry impulses from the retina to the brain, where the visual information is processed. Focus on the distinction between the functions of the optic nerve and the structures that refract light.
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