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3.1 Coordination and control – the nervous system

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Question 26

A person steps onto an uneven surface. Receptors in the inner ear detect a change in the position of the person's head and send impulses along sensory neurones to the central nervous system. The central nervous system sends impulses along motor neurones to muscles in the lower legs.

Explain why the muscles in the lower legs, rather than the receptors in the inner ear, are effectors. Predict how the response would differ if a motor neurone carried impulses to a gland instead.

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3.1 Coordination and control – the nervous system Questions

  1. GCSE
  2. /Biology
  3. /3.1 Coordination and control – the nervous system

135 exam-style questions on OCR GCSE Biology 3.1 Coordination and control – the nervous system, covering 3.1.1 Structure of the nervous system, 3.1.2 Coordinated response, 3.1.3 The reflex arc, 3.1.4 Structure of the eye, 3.1.5 Defects of the eye, 3.1.6 Structure and function of the brain, 3.1.7 Difficulties of investigating brain function, and 3.1.8 Limitations in treating nervous system damage. Each one has a worked solution and a mark scheme showing where the marks go.

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