1. Sponge: Set up Cornell Notes on pg. 39 Topic: 6.1 Skin and the regulation of body temperature Essential Question: 1.List the general functions of the skin 2.Why is the regulation of body temperature so important? 2.1 Atoms, Ions, and Molecules 1.List the general functions of the skin 2.Why is the regulation of body temperature so important? 6.1 Skin and the regulation of body temperature

2. p. 38 2 Skin Video # 1 Skin Video # 2 15 bullets 10 bullets PERIOD 3

3. p. 38 3 Skin Video # 1 Skin Video # 2 15 bullets 10 bullets Radiation picConduction pic Convection pic Evaporation pic (PERIOD 4/5)

4. 4 Chapter 6 Skin and the Integumentary System Maintains homeostasis Protective covering Retards water loss Prevents microorganisms from entering the body Regulates body temperature Houses sensory receptors Contains immune system cells Synthesizes chemicals Excretes small amounts of waste Functions of the Integumentary System

5. 5 Two or more kinds of tissue grouped together and performing specialized functions= organ The skin is the largest organ in the body by weight

6. 6 Skin Cells Skin cells help produce Vitamin D needed for normal bone and tooth development Some cells (keratinocytes) produce substances that simulate development of some WBCs

7. 7 Regulation of Body Temperature: Review Even slight shifts can disrupt the rates of metabolic reactions Deeper body parts should be approx 98.6 degrees Amount of heat loss should = amount of heat produced Skin plays a key role

8. 8 When body temperature rises…. Nerve impulses stimulate structures in the skin and organs to release heat Blood carries heat away Warm blood reaches the brain and signals walls of blood vessels to relax Deeper blood vessels contract- leading blood to the surface- skin reddens Heat escapes to outside Regulation of Body Temperature: Review

9. 9 When body temperature drops… Muscles in the walls of dermal blood vessels are stimulated to contract or become constricted Decreases the flow of heat-carrying blood through skin Leads to color loss Sweat glands remain inactive Muscle cells in the skeletal muscle contract rhythmically= shiver Regulation of Body Temperature: Review

10. 10 Active cells are major heat producers : Skeletal muscle cells Cardiac muscle cells

11. 11 Radiation: The primary means of body heat loss infrared heat rays escape from warmer surfaces to cooler surroundings Types of Heat Loss Draw on p. 38

12. 12 Conduction: Heat moves from the body directly into the molecules of cooler objects in contact with its surface Less heat loss than radiation Ex: heat moves into the seat of a chair Continues as long as the seat is cooler than the body touching it Ex: heat moving into colder sheets/pillow Draw on p. 38

13. 13 Convection: Heat lost to air molecules that contact the body Less heat loss than radiation Air becomes heated  Warm air moves away from body  Replaced by cooler air Draw on p. 38

14. 14 Evaporation: When body temperature rises, sweat gland release sweat As sweat dries, it evaporates and carries heat away from the surface Draw on p. 38

15. 15 Skin # 1 Skin # 2 15 bullets 10 bullets 8m 28s 4m 33s

16. Children Die After Being Left in Hot Cars Directions: Read the article. HIGHLIGHT the answers to these questions as a way to “prove” your answer. 4. How/When do most of the deaths occur? 5. How long does it take for the temperature in a car to rise 20°? To 34°? How does this explain how it is NEVER ok to leave a child in a car, no matter what the temperature outside is? 6. Why is a child more at risk of hyperthermia? Approx. how long before a child is in danger of dying? At what temperature is death expected? 7. What caused the dramatic increase in DEATHS due to children being left in cars since the early 1990s? 8. What were some of the ways to remind yourself to check the backseat? 16 DUE TOMORROW

17. Sponge: Set up Cornell Notes on pg. 41 Topic: 6.1 Regulation of Body Temperature Cont. Essential Question: 1. State the MAJOR differences between HYPOthermia and HYPERthermia. 2.1 Atoms, Ions, and Molecules 6.1 Regulation of Body Temperature Cont’ 1. State the MAJOR differences between HYPOthermia and HYPERthermia. Get out homework for signature

18. Taping Time!!! 34: Connective Tissue microscope Lab 35: Muscle and Nervous Tissue microscope Lab 36: Study Guide AND Practice Test 37: Notebook Check TESTS MUST BE RETURNED TO MRS. M

19. 19 Hypothesize with your table: What is HYPOthermia? What is HYPERthermia? Can you come up with an example of each? Hint: Remember we are talking about how skin helps regulate body temperature.

20. Uncontrolled Temperature Regulation Hypothermia Hyperthermia P. 41

21. 21 HYPERthermiaHYPOthermia HYPOthermia involves a dramatic drop in body temperature HYPERthermia involves a dramatic rise in body temperature

22. 22 HYPERthermiaHYPOthermia Can we think of any creative ways to remember that HYPOthermia involves a dramatic drop in body temperature and HYPERthermia involves a dramatic rise in body temperature?

23. 23 Hypothermia: body temperature drops to a dangerous level Caused by prolonged exposure to cold May cause mental confusion, loss of reflexes, loss of consciousness If body core drops just a few degrees, can lead to death However, the arms and legs can withstand drops of 20-30 degrees

24. Death by Hypothermia 2m 24

25. 25 Hyperthermia: When body temperature rises too high May occur if the temperature outside is hotter than body temperature May gain heat from surroundings and become hotter Can lead to fatigue, dizziness, heat exhaustion, headaches, muscle cramps, nausea, or even death

26. 26 Hyperthermia to treat Cancer Long needles are put directly into the tumor Heat is directed into the tumor Used along with radiation and/or chemotherapy

27. Children Die After Being Left in Hot Cars Directions: Use your notes to answer the first 3 questions on your reading from yesterday. 1.What is hyperthermia? 2.How does one get hyperthermia? 3. What are the dangers of hyperthermia 27

28. 28 Watch ABC News Clip: 8 Children Left in Hot Cars in August (2012) Hyperthermia in the News:

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32. Preventable Deaths: Leaving Children in Cars 1m45s 32

33. Sounding the Alarm 2m37s http://www.today.com/video/new-car-seat-alerts- you-if-baby-is-left-in-car-490029635670 33

34. Which is Which? Use your whiteboard to tell me… HYPO or HYPERthermia???? 34

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43. Using the Homeostatic response sheet on Pg. 12… Task: Write a two-three paragraph journal entry on either hyperthermia OR hypothermia. Pretend you are someone suffering from hypothermia or hyperthermia. Please write two-three paragraphs describing your circumstances and the effects hyperthermia or hypothermia is having on your body. Make sure to include these details: Where are you? What are the circumstances that led you to this fate? (Backstory) Explain in detail the physical effects that you are experiencing. 43 P. 41 DUE: THURSDAY