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Maintaining Homeostasis

Maintaining Homeostasis. The Immune System. Maryland Science Content Standard.

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Maintaining Homeostasis

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  1. Maintaining Homeostasis The Immune System

  2. Maryland Science Content Standard • Students will explain and describe that the complex set of systems found in multicelluar organisms are made up of different kinds of tissues and organs which are themselves composed of differentiated cells (levels of organization)

  3. Objective • You will revisit how the body self regulates to maintain a stable internal environment (homeostasis), despites changes in the external environment. You will relate this information to your life by understanding a fever (caused by the immune system) is a beneficial human reaction while fighting infection.

  4. Notebook • Title: Homeostasis and the Immune System • Date: 1/4/2020

  5. Let’s Think….. • In your notebook: • What is considered to be a normal body temperature? • What else can you think of that is this temperature? • Are all body temperatures the same?

  6. LabQuests • Take your temperature using the temperature probe by placing the thermometer in the fold of your elbow. • Hold the thermometer there for 45 seconds • Set the time on the thermometer • Find the average for your group • Find the average for your table • Predict the average for the class and explain your reason

  7. Video • Watch FEVER! (earphones) • Answer the following: • What sets body temperature? What can change the set point for body temperature? • How does stress affect body temperature? • How is fever different from a simple rise in body temperature? • What role might fever play in fighting infection? • Why does the body sweat when a fever breaks?

  8. Body Control….. • Complete the following Web Activity • Body Control Center • Answer the following in your notebook: • What is homeostasis? • What controls human heart rate? When does heart rate change? • How is respiration rate controlled?

  9. Continue….. • Could you hold your breath indefinitely? What would happen? • In what different ways does the body control temperature? • How does the body maintain a steady level of sugar in the bloodstream? What happens if it is unable to regulate blood sugar? • What factors control blood pressure?

  10. And more….. • How is this Body Control Center simulation like the self regulation that goes on in an actual human body? How is it different?

  11. Consider this….. • What happens when the body’s ability to self-regulate breaks down? • Explore Body Breakdowns • Subtitle paper: Body Breakdowns • Answer the questions on the following slide

  12. Questions • Chose one part of the body from the diagram: • Explain how high altitudes results in a problem • Explain the symptoms that the problem would produce • Explain how a specific action would relieve the problem • What do you think are the two or three most significant challenges the human body faces at very high altitude? Why?

  13. Conclusion • Choosing an activity you are involved in, explain how your homeostasis is changed throughout the activity. • When is your body trying to regulate? • How do you know? • When does your body return to homeostasis and how do you know?

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