Barbara Engebretsen

HOMEOSTASIS: Review Set Point Negative Feedback Receptor (Sensor) Effector: Signal Transduction (911!) Response

Assignment: Review pages 4-5 Which two organ systems are involved in “detection and regulation”? (Mechanisms of Homeostasis)

QUESTION: What are Major Health Risk Factors Faced by Americans Today? What Causes Obesity? Energy Imbalance? Genetic Tendency? VIRUS?

Deeper Thinking: How do people regulate their weight? How can people maintain their weight without constantly and precisely measuring “calories in and calories out”?

Body Mass Homeostasis BRAINSTORM: Design an “Ideal” Body Mass Homeostasis Model: Where would be a good place to have a “mass sensor” to detect body weight? Should the sensor detect weight or fat or lean tissue?

Body Mass Homeostasis Model: What organ system(s) would be good “Effectors” for monitoring and maintaining constant body mass? What physiological “Responses” would be involved in Body Mass Homeostasis?

Summarize Your Model: Set Point: Sensor(s): Effector(s): Responses:

Introduction to the Nervous System: Read: Chapter 8: Objectives 1-4: Briefly summarize your understanding of those objectives (<1 page typed)

That’s Enough For the Today!