Topic 6 - Reflexes

Question 1

what are reflexes?

Answer 1

automatic responses to certain stimuli - they reduce the chance of being injured

Question 2

what happens in a reflex arc?

Answer 2

1. a stimulus is detected by receptors
2. an impose is sent along a sensory neurone to the CNS
3. impulses are passed along to a relay neurone in the CNS
4. relay neurones pass the impulse to a motor neurone
5. impulse travels along a motor neurone to the effector
6. muscle contracts