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1 markCoordination and Control

CSEC Human and Social Biology · January 2018 · Paper 2 · Question 3(a)(i)

Figure 3 shows the cross-section of a human eye.

Identify the structure labelled A.

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Other parts of this question

  1. 3(a)(ii)Identify the structure labelled C.[1 mark]
  2. 3(a)(iii)Identify the structure labelled G.[1 mark]
  3. 3(b)(i)Which letter represents the structure that converts light energy to nerve impulses?[1 mark]
  4. 3(b)(ii)Which letter represents the structure that refracts light and helps the eyeball keep its shape?[1 mark]
  5. 3(b)(iii)Which letter represents the structure that supports the lens?[1 mark]
  6. 3(c)(i)Name the condition Nigel has developed and state the cause of the condition.[3 marks]
  7. 3(c)(ii)What type of lens should be used to correct the problem?[1 mark]
  8. 3(d)Nigel's wife was diagnosed with hypertension five years ago and has vision problems. Suggest a possible eye disease that she may have developed and how it may…[2 marks]
  9. 3(e)Lee's best friend says that our eyes really see things upside down. State whether Lee's friend is telling the truth and explain your response.[3 marks]

More practice: the rest of this paper · more Coordination and Control questions · all CSEC Human and Social Biology past papers