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2 marksCoordination and Control

CSEC Human and Social Biology · January 2010 · Paper 2 · Question 3(b)(i)

Jean throws a ball at Dinah's face and Dinah blinks.

Explain what is meant by the term 'reflex action'.

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Other parts of this question

  1. 3(a)(i)Name the parts labelled A and B in Figure 1.[2 marks]
  2. 3(a)(ii)State ONE function of the parts labelled B in Figure 1.[1 mark]
  3. 3(b)(ii)Identify which of the two actions, throwing the ball or blinking, is a reflex action, and which is a voluntary action.[2 marks]
  4. 3(c)(i)Complete the diagram of the eye in Figure 2 to show where light from a near object will focus when Dinah looks at it.[1 mark]
  5. 3(c)(ii)Suggest the type of lens Dinah must use to correct long sightedness.[1 mark]
  6. 3(c)(iii)In the box provided, draw the shape of the lens needed to correct short sightedness.[1 mark]

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