The Reflex Arc Goes Through the CNS

Question 1

1. Where do the neurones in reflex arcs go?

Answer 1

Through the spinal cord or through an unconscious part of the brisn

Question 2

2. What happens when a stimulus is detected by receptors?

Answer 2

An impulse is sent along a sensory neurone to the CNS

Question 3

3. What does the sensory neurone pass on the message to?

Answer 3

Another type of neurone - a relay neurone

Question 4

4. What is the gap between the two neurones called?

Answer 4

A synapse

Question 5

5. How are messages passed across synapses?

Answer 5

Using chemicals

Question 6

6. Where do relay neurones relay the impulse to?

Answer 6

A motor neurone

Question 7

7. Where does the impulse travel along and where to?

Answer 7

The motor neurone to the effector

Question 8

8. What does the muscle then do?

Answer 8

Contact and move your hand away from the candle

Question 9

9. Why is it quicker than normal responses?

Answer 9

Because you don’t have time to think about it