Biology 0610 · IGCSE · Coordination and response

Coordination and response — practice question

The diagram illustrates a simple reflex arc. After the knee is tapped, which sequence of events is correct?

  • A1 → 2 → 3 → 4
  • B1 → 4 → 2 → 3
  • C4 → 2 → 1 → 3
  • D4 → 3 → 2 → 1

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