1. Title: Reflex Actions
Learning Objectives
What is a reflex?
Why are reflexes so important?
Key Words: Reflexes, reflex arc, synapses, relay neuron, chemicals

2. What are Reflexes?
Learning Objectives
What is a reflex?
Why are reflexes so important?
Automatic responses are known as reflexes. E.g. Pulling your hand away when you touch something hot.
Key Words: Reflexes, reflex arc, synapses, relay neuron, chemicals

3. What are Reflexes for?
Learning Objectives
What is a reflex?
Why are reflexes so important?
Reflexes help your avoid danger or harm. They also take care of your basic body functions like breathing.
Key Words: Reflexes, reflex arc, synapses, relay neuron, chemicals

4. How do reflex actions work?
Learning Objectives
What is a reflex?
Why are reflexes so important?
Reflexes actions involve a reflex arc, which is an impulse sent from a sensory neuron to a relay neuron in the CNS. The impulse is then sent along a motor neuron to an effector organ.
Key Words: Reflexes, reflex arc, synapses, relay neuron, chemicals

5. How do reflex actions work?
Learning Objectives
What is a reflex?
Why are reflexes so important?
Key Words: Reflexes, reflex arc, synapses, relay neuron, chemicals

6. How do synapses work?
Learning Objectives
What is a reflex?
Why are reflexes so important?
Your nerves are not joined directly to each other, there are junctions between them known as synapses
Key Words: Reflexes, reflex arc, synapses, relay neuron, chemicals

7. How do synapses work?
Learning Objectives
What is a reflex?
Why are reflexes so important?
E.g. When an impulse from a sensory neuron arrives at a synapse with a relay neuron, a chemical messenger is released. The chemical travels across the synapse to the relay neuron. This sets off an electrical impulse that travels along the relay neuron.
Key Words: Reflexes, reflex arc, synapses, relay neuron, chemicals

8. How do synapses work?
Learning Objectives
What is a reflex?
Why are reflexes so important?
E.g. When an impulse from a sensory neuron arrives at a synapse with a relay neuron, a chemical messenger is released. The chemical travels across the synapse to the relay neuron. This sets off an electrical impulse that travels along the relay neuron.
Key Words: Reflexes, reflex arc, synapses, relay neuron, chemicals

9. Task
1. In a Arc, the electrical impulse bypasses the areas of the brain. The time between the and the Is as short as possible. Only neurons, .... neurons and neurons are involved. 2. Draw a flow chart to explain what happens when you step on a pin. 3. Using the example of a relay and motor neuron, explain how a synapse works.
Learning Objectives
What is a reflex?
Why are reflexes so important?
Key Words: Reflexes, reflex arc, synapses, relay neuron, chemicals