Study Guide

Name: _____n__________________ Date: ________________________

1.3.1.2 - 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? Raises the temperature by kicking on the heat. _________________________________

2. What does a thermostat do if it gets too hot? _Lowers the temperature by kicking on the AC____________________________________

3. How do our bodies sometimes act like a thermostat? _When we are too hot, our body sweats to cool our body down. When we are too cold, we shiver to keep our heart pumping and keep our blood flowing. ______________________________

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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? _____32 degrees Fahrenheit________

2. What is the initial body temperature? ___99 degrees Fahrenheit________

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__________Sweating: decrease ________________

Lowering air temperature: _____decrease___________Shivering: _increase __________

Adding clothing: increase________________ Exercising: increasing_____________...