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The human eye is able to adjust to different light levels and object distances.

Cross-section diagram of the human eye showing various parts

a.

What is the biological term for the process of adjusting the focus of the eye for objects at different distances?

[1]
b.

Which letter (P, Q, or R) represents the retina, where light is focused to form an image?

[1]
c.

Describe the state of the ciliary muscles, the suspensory ligaments, and the lens when the eye focuses on a distant object.

[3]
d.

Explain how the muscles in the iris react when a person moves from a brightly-lit environment into a dimly-lit environment, and explain how this helps them to see.

[4]

5.2 The human nervous system Questions

Practise AQA GCSE Biology 5.2 The human nervous system with exam-style questions for Foundation and Higher tier. 49 questions covering 5.2.1 Structure and function, 5.2.2 The brain (biology only), 5.2.3 The eye (biology only), and 5.2.4 Control of body temperature (biology only), matched to the AQA GCSE Biology (8461) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

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5.2 The human nervous system Questions

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  3. /5.2 The human nervous system