The reflex arc
- Created by: alexda
- Created on: 08-05-14 16:34
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- The Reflex Arc
- Reflexes are automatic responses to a stimulus so they reduce the chances of being injured.
- The neurones in reflex arcs go through the spinal cord or through an unconscious part of the brain.
- 1. When a stimulus is detected by receptors impulses are sent along a sensory neurone to the CNS.
- 2. In the CNS the sensory neurone passes the nerve impulse to a relay neurone which relay the impulses to a motor neurone.
- 3. The impulses then travel along the motor neurone to an effector which responds (e.g. muscle contracts)
- 2. In the CNS the sensory neurone passes the nerve impulse to a relay neurone which relay the impulses to a motor neurone.
- The reflex arc is quicker than a normal response because you don't have to think about it.
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