5.2 The human nervous system

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Question 22
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Figure 1 shows a cross-section of a human eye with a vision defect.

Figure 1

a.

Label structures P and Q on Figure 1.

Choose answers from the box:

  • cornea

  • suspensory ligaments

  • retina

  • iris

  • ciliary muscles

  • Structure P: __________

  • Structure Q: __________

[2]
b.

Complete the following sentences about how a normal eye focuses on a near object.

Choose the answers from the options in the brackets:

  1. To focus on a near object, the ciliary muscles [contract / relax] __________.
  2. This causes the lens to become [thicker / thinner] __________.
[2]
c.

  1. Using Figure 1, give the reason why this person cannot see a distant object clearly.

  2. Give one way, other than wearing spectacles, that this vision defect can be corrected.

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5.2 The human nervous system Questions

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