1. COPY LEARNING TARGET 2/17 #4 I can explain how systems need to work together to maintain homeostasis in our body *LAST ONE FOR THIS CHAPTER

2. AGENDA 2/17 1.Go over ACT questions 2.QUIZ back 3.Ch 4 NOTES #6 – Last ones for CH 4 THIS WEEK W = Study Guide Clicker Th = make up day Ch 4 (EC if caught up) F = Ch 4 TEST (big points)

3. Take our your NEW ACT PRACTICE score sheet 4

7. Put your ACT practice score on your sheet Keep adding stars until you reach the top!

8. CH 5 NOTES #6 Body Systems and Homeostasis

9. NO BODY SYSTEM CAN WORK WITHOUT THE OTHERS THEY WORK TOGETHER TO MAINTAIN A BALANCE IN OUR BODY - HOMEOSTASIS

10. The brain ultimately is the one that keeps everything in balance in our body Sensors around the body let the brain know if something is too much/ little or too high/low

11. Brain sends messages through nerves or hormones to cause a change back to normal NERVOUS SYSTEM + ENDOCRINE SYSTEM = BODY BALANCE

12. NEGATIVE FEEDBACK – when the brain detects a change in the body and it causes a change in the opposite direction EX: BP too high, so it lowers it sugar levels too low, so it increases it temperature high, so it lowers it (sweat)

13. Body detects a decrease in O2 1)Makes you decide to breath OR 2)Makes you pass out so your brain can take back over decision to breathe

14. THINGS WE NEED TO KEEP IN HOMEOSTASIS IN OUR BODY: EXAMPLES: 1. Temperature 2. Water 3. Sugar 4. Calcium / minerals 5. Blood pressure

15. 1. TEMPERATURE SYSTEMS: Nervous Circulatory Integumentary Muscular

16. 2. WATER SYSTEMS: Nervous Endocrine Excretory Circulatory

17. 3. SUGAR SYSTEMS: Digestive Circulatory Endocrine

18. 4. CALCIUM BALANCE SYSTEMS: Endocrine Skeletal Digestive Excretory

19. 100’s of examples more!!!! TODAY – we will look at blood pressure balance

21. BLOOD PRESSURE

23. REST OF THE HOUR – work with partner or group of 3 Finish sheet and turn in