1. Read “Tougher Than The Sun?” handout 10/19/15 Date:10/19/15Topic:HomeostasisPage # ___

2. Today in Room 315… Date:10/19/15Topic:HomeostasisPage # ___ ADMIT SLIP: Read “Tougher Than the Sun?” HW: Write a story about a time your body had to maintain homeostasis CONTENT OBJ: SW recognize that the body’s systems interact to maintain homeostasis, and brainstorm examples of these processes LANG. OBJ: SW write a story of how their body maintained homeostasis in an extreme environment ANNOUNCEMENTS: Grades updated & posted AGENDA: Read “Tougher than the sun?” Define homeostasis Introduce Nervous System Brain charades Discuss Feedback loops EXIT SLIP: Give an example of a positive or negative feedback loop from everyday life

3. Tougher Than the Sun? Student overview (what was it about?) What stresses from the external environment did Josh’s body (his internal environment) have to balance? How did the choices that Josh made affect how his body was being stressed by the external environment? What better choices could he have made?

4. What about Molly?? What symptoms did Molly show that were evidence that her body (her internal environment) was under stress from the conditions outdoors (her external environment)? Maintaining body temperature: Humans vs. Lizards?

5. Maintaining Body Temperature* Endotherms: Animals which create their own heat (Ex?) Ex. mammals & birds Ectotherms: Animals which receive heat primarily from external environments (Ex?) Ex. Amphibians, reptiles, fish

6. Brainstorm Competition As a group, come up with ways organisms maintain a stable internal environment, even when the external environment is changing Think of humans, other mammals, reptiles, etc. Group that comes up with the most, wins! You have three minutes- go!!!

7. Brainstorm Share Out Groups count how many ideas they created Group with the highest list reads Anyone contest (disagree)? Other groups contribute ideas

8. Homeostasis* Definition? “The tendency of the body to maintain stable internal conditions, even as the external environment changes” Ex. Cold outside  Body shivers Clip: https://www.youtube.com/watch?v=9RLnlXNlfdk https://www.youtube.com/watch?v=9RLnlXNlfdk

9. Components of Homeostasis* -temperature What else??

10. Maintaining Homeostasis How does our body do it?? Nervous System!

11. Nervous system* Two parts of the nervous system Central nervous system Brain Spinal column Peripheral nervous system Nerve fibers/tissues Control center??? *** Meaning edge, outside, or outskirts

12. Brain vs. Mind

13. Brain and homeostasis? How is the brain responsible for maintaining homeostasis? Examples? (Which part of the brain?)

14. Major Parts of the Brain* CerebrumCerebellum Brain Stem Draw and label in your notebook!

15. Cerebrum* MovementTouchVisionHearingJudgmentReasoning Problem solving EmotionsLearning Body temperature

16. Cerebellum* Controls movement Voluntary muscle movement Fine motor skill Posture, balance

17. Brain Stem* Controls the vital functions Involuntary movements: Cardiac function BreathingSwallowing Eye movement Hunger

18. Specialized Region* Located below the cerebrum is a specialized part of the brain called the hypothalamus Hypothalamus regulates many physiological processes important to homeostasis Examples include… water balance, body temp, feeding, sleep, and endocrine functions

19. Brain Game: Charades Each person will come up and be told an action to do. The class will then guess which part of the brain is responsible. Options: Cerebrum, cerebellum, brain stem, hypothalamus

20. Which part of the brain? Why? Holding a pencil Pumping blood Standing on one foot Feeling sad Following a finger with your eyes Walking Deciding if you should jump the fence Taking medicine Wanting an apple across the room and going over and eating it Take 2 minutes to discuss/decide with your partner

21. Revisited… So which parts of the brain are responsible here? …

22. Homework In your journal, describe a time that you experienced harsh external conditions, what your body did to maintain homeostasis, and which part of your brain was at work. Ex. Shoveling in 5 degree weather, your body shivered (though you also had a coat), and your cerebrum maintained your temp. Tell a full story!!! Make it up if needed.