Student Exploration: Human Homeostasis, Study notes of Human Biology

Download Student Exploration: Human Homeostasis and more Study notes Human Biology in PDF only on Docsity! Student Exploration: Human Homeostasis PRIOR KNOWLEDGE QUESTIONS (Do these BEFORE using the Gizmo.) A thermostat is a device that regulates the temperature inside a building. Answer the questions on your student sheet. 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. Answer the questions on your student sheet. 1. What is the initial air temperature? 2. What is the initial body temperature? 3. Next to each factor, write “increase,” “decrease,” or “same” based on how you expect that factor to affect body temperature. Activity A: Body temperature Get the Gizmo ready:  If necessary, click Reset ( ). 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 ( ). Answer question. 2. Gather data: Fill in the first line of the data table. 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.) A. Set the Exercise level to 70%. (All other settings in default position.) B. Set the Sweat level to 70%. C. Under Body position, select Shivering. D. Next to Clothing, click Add four times to add a sweatshirt, hat, pants, and parka. 3. Analyze: To determine the effect of a factor on body temperature, compare the final body temperature with that factor to the final body temperature while standing still. Based on this comparison, fill in the last column of the data table. (increase/decrease/no change)