Question detail
What happens to the ciliary muscles when focusing on a near object?
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. They relax
- B. They contract
- C. They become rigid
- D. They shorten
Answer
The correct option is They contract. This answer is correct because it matches the approved learning objective to explain how ciliary muscles and suspensory ligaments change the shape of the lens during accommodation in the subtopic The eye (biology only).
Explanation
The correct option is They contract. They contract is correct because it directly supports the approved learning objective to explain how ciliary muscles and suspensory ligaments change the shape of the lens during accommodation. 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
Ciliary Muscles and Suspensory Ligaments Function
Students often confuse the roles of ciliary muscles and suspensory ligaments during accommodation, thinking they both contract or relax in the same way.
Remember that when focusing on near objects, ciliary muscles contract, causing the lens to become thicker, while suspensory ligaments loosen. For distant objects, ciliary muscles relax and suspensory ligaments tighten, making the lens thinner.
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