IGCSE Biology / Coordination

Reflex actions

Edexcel International GCSE Biology (4BI1), chapter 6: Coordination, specification point 2.90. Part of the full course.

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A reflex is a rapid, automatic response that protects the body from harm. Its reflex arc carries an impulse through the spinal cord without waiting for a conscious decision by the brain.

More lessons in Coordination

• Central and peripheral nervous system
• Comparing nervous and hormonal control
• The three types of neurone, and the synapse
• The structure of the eye
• Focusing on near and distant objects
• Bright light and dim light