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Reflex actions

Reflex actions

Reflex arc showing a heat receptor in a finger connected by a sensory neurone to a relay neurone in the spinal cord, then by a motor neurone to an arm muscle

A reflex action is a rapid, automatic response to a stimulus that happens without conscious thought. It is involuntary, so it does not depend on a decision.

2.3.5 Structure and function of a reflex arc Lesson

  1. GCSE
  2. /Biology
  3. /2.3.5 Structure and function of a reflex arc

Step-by-step lessons on Edexcel GCSE Biology 2.3.5 Structure and function of a reflex arc. Each one builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.

Lessons