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Human Homeostasis

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Human Homeostasis
Name: ______________________________________ Date: ________________________

1.3.1.2 - Human Homeostasis

Vocabulary: dehydration-lack of water needed in your body
Heat stroke-highest body temperature where you need medical attention
Homeostasis- when an organism maintains stable internal conditions in a changing environment Hypothermia-lowest body temperature where you need medical attention Involuntary-automatic occurance Thermoregulation -the process in which a steady temperature is maintained inside the body Voluntary-occurance in which you have to think about and make a choice to do

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? __________lowers the mercury level__________________________

2. What does a thermostat do if it gets too hot? _____________increases the mercury level________________________

3. How do our bodies sometimes act like a thermostat?
_______________________We react to the heat or cold with changing to a level that is stable__________________________________________________

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 Farenheit______

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:

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