1. Aim: How Do Our Reflexes Function?
DO NOW
Quick Quiz Questions

2. Sense Organs How many do we have? What are they?
All sense organs contain receptors groups of cells which are sensitive to a stimulus
(ex. light, heat)
For every stimulus there is a response

3. Sense Organs Visual

4. Receptors What kind of receptors are found in your eyes?
What kind of receptors are found on your tongue?
What kind of receptors are found in your ears?
What kind of receptors are found on your skin?

5. Visual

6. Receptors
Turn energy into electrical impulses that are transmitted along neurons
Is this transmission a slow or fast process? Why?

7. Skin Receptor Examples

8. Reflex Arc A reflex arc allows for very quick responses
Reflex actions are automatic or done without thinking
Q: Is the brain involved?
Q: What is the purpose of reflex actions?

9. Reflex Arc Example

10. Example #2 Bee stings your finger! Sting
Stimulation of pain receptor on skin
Message travels along sensory neurons
Message passed along interneurons along spinal cord
Message travels along motor neurons
When message reaches muscle, it contracts!

11. Animation

12. Video https://www.brainpop.com/health/bodysystems/nervoussystem/

13. Group Activity
Work on handout distributed in class

14. Individual Activity
Answer AIM

15. Homework
Finish Handout
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