Presentation on theme: "Human Feedback Systems"— Presentation transcript:
1 Human Feedback Systems Look Mama, It’s Alive!Human Feedback Systems
2 Interdependence occurs among living systems TAKS Objective 2 – The student will demonstrate an understanding of living systems and the environmentInterdependence occursamong living systems
3 TEKS 8.6The student knows that interdependence occurs among living systems. The student is expected to identify feedback mechanisms that maintain equilibrium or systems such as body temperature, turgor pressure, and chemical reactions
4 Lesson ObjectivesThe learner will produce a graph or sketch to describe a negative feedback system, such as for serotonin production.The learner will demonstrate understanding of how blood glucose is controlled in humans by creating labeled drawings and providing a summary of the process.The learner will produce a labeled sketch that describes thermal regulation in humans.
5 True or False: Each body system works in isolation QuestionTrue or False: Each body system works in isolation
6 Body systems are interrelated and work through a series of feedback systems
7 True or False: Feedback systems react quickly QuestionTrue or False: Feedback systems react quickly
8 In feedback systems, the action of a system components is typically slow in terms of time. That is, there is a build up in one direction and slowly, the body returns to homeostasis.
9 Identify human systems and their function Prior Knowledge
19 Blood Glucose LevelPancreatic Hormones regulate blood sugar level before and after meals.Islets; clusters of cells in pancreasAlphasecrete GLUCAGON – increases sugarBeta secrete INSULIN – decreases sugar
20 What Happens? Between meals Blood glucose lowPancreas secretes glucagonLiver changes glycogen to glucoseglucose sent to target tissuesAfter a mealBlood glucose highPancreas secretes insulinGlucose goes to the Liver(Glygogen) and goes to Target tissues
22 Fight or FlightIn emergencies, adrenaline is released by the body to override the homeostatic control of glucose. This is done to promote the breakdown of glycogen into glucose to be used in the emergency. These emergencies are often known as 'fight or flight reactions'.
23 Fight or FlightAdrenaline is secreted by the adrenal glands. The secretion of it leads to increased metabolism, breathing and heart rate. Once the emergency is over, and adrenaline levels drop, the homeostatic controls are once again back in place
26 ENGAGEView the video clip, “The Search for Answers” beginning at 2:50.The Search for Answers
27 EXPLORECompare the level of serotonin and serontonin receptors. Stop the video at 3:50, 3:56, and 4:03
28 EXPLAIN 1. What is the role of serotonin? 2. What is the effect of high levels of serotonin on the body?3. Explain how the body attempts to regulate serotonin levels?4. Relate serotonin regulation to anorexia nervosa.
29 Role Play: The Rise and Fall of Glucose ELABORATERole Play: The Rise and Fall of Glucose
30 How does the body keep from overheating? How does the body keep warm? ELABORATEHow does the body keep from overheating?How does the body keep warm?
31 EVALUATEProduce a sketch or graph and describe a negative feedback system.Produce a labeled sketch of thermal regulation in humans.Summarize the regulation of blood glucose
32 Calcium and glucose levels Concept MapThe Endocrine SystemregulatesGrowthWater balanceReproductionMetabolismCalcium and glucose levelsResponse to stressby means of theby means of theby means of theby means of theby means of theby means of thePituitaryOvariesTestesThyroidPancreasAdrenalsParathyroids