ël Gizmos Name: Naga Date: 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? It makes the place warmer 2. What does a thermostat do if it gets too hot? It makes the plaxe more cool 3. How do our bodies sometimes act like a thermostat? They regulate temperatures 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. Air temp. 0 °C, 32 °F Body temp. 37 °C, 99 °F 1. What is the initial air temperature? 0 degrees 2. What is the initial body temperature? 37 degrees 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: increase Lowering air temperature: decrease Adding clothing: increase Sweating: decrease Shivering: imcrease Exercising: increase Reproduction for educational use only. Public sharing or posting is prohibited. 2019 ExploreLearning® All rights reserved
Activity A: Body temperature Get the Gizmo ready: · If necessary, click Reset ( 2). Question: What factors increase or decrease body temperature? 1. Observe: With the Air temp. at 0 ? (32 ºF) and Body temp. at 37 ? (99 ºF), click Play ( ). After one simulated hour (does not have to be exact), click Pause ("]). What is the body temperature after one hour? 37 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.) . Click Reset. Set the Sweat level to 70%. (All other settings in default position.) . Click Reset. Below Body position, click Shivering. (Other settings in default mode.) . Click Reset. Next to Clothing, click Add four times to add a sweatshirt, hat, pants, and parka. (Other settings in default mode.) Factor Standing still 37 36 Exercising 37 Sweating Shivering Adding clothing Initial body temp. 37 37 37 Body temp. after one hour 38 34 38 37 Effect of factor on body temperature 34 34 35 37 37 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. A. Which factor raised body temperature the most? Excercise B. Why