HumanHomeostasis GISMO.docx

Student Exploration: Human Homeostasis Vocabulary: dehydration, heat stroke, homeostasis, hypothermia, involuntary, thermoregulation, voluntary Prior Knowledge Questions (Do these BEFORE using the Gizmo.) A thermostat is a device that regulates the temperature inside a building. 1. What does a thermostat do if it gets too cool? answer ___________________________________ 2. What does a thermostat do if it gets too hot? answer 3. How do our bodies sometimes act like a thermostat? answer Gizmo Warm-up To survive, an organism must be able to maintain stable internal conditions in a changing environment. This process is called homeostasis. The Human Homeostasis Gizmo allows you to explore how the human body stays at a nearly constant temperature in different conditions. Notice the Air temp. and Body temp. thermometers representing the air temperature and body temperature. 1. What is the initial air temperature? answer 2. What is the initial body temperature? answer 3. Next to each factor listed below, write “increase,” “decrease,” or “same” based on how you expect that factor to affect body temperature. Raising air temperature: ________________ Sweating: ________________ Lowering air temperature: ________________ Shivering: ________________ Adding clothing: ________________ Exercising: ________________ This study source was downloaded by from CourseH on :28:27 GMT -06:00 2019 Activity A: Body temperature Get the Gizmo ready:  If necessary, click Reset ( ). Question: What factors increase or decrease body temperature? 1. Observe: With the Air temp. at 0 °C (32 °F) and Body temp. at 37 °C (99 °F), click Play ( ). After one simulated hour (does not have to be exact), click Pause ( ). What is the body temperature after one hour? ____________________________________ 2. Gather data: Fill in the first line of the data table below. Then, use the same procedure to test the effect of each of the following factors. Click Reset between each trial. Record the initial and final body temperatures in the table below. (Leave the last column blank.)  Set the Exercise level to 70%. (All other settings in default position.)  Set the Sweat level to 70%.  Under Body position, select Shivering.  Next to Clothing, click Add four times to add a sweatshirt, hat, pants, and parka.