Name: Eliza Walmark Date: 10/4/21
Student Exploration: Human Homeostasis
username: student20.21
password: shsbio
Directions: Follow the instructions to go through the simulation. Respond to the questions and
prompts in the orange boxes.
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?
If it gets to cold a thermostat automatically turns the heat on
2.What does a thermostat do if it gets too hot?
If it gets to hot a thermostat automatically turns the air conditioning on
3.How do our bodies sometimes act like a thermostat?
To make us warmer our bodies shiver, and to make us colder our bodies sweat.
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. andBody temp.
thermometers representing the air temperature and body temperature.
What is the initial air temperature?
0 C/ 32 F
1.What is the initial body temperature?
37 C/ 99 F
2.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: increase
Activity A:
Body temperatureGet 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?
The body's temperature is 36 C/ 98 F
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 are in the default position.)
●Set the Sweat level to 70%. (All other settings are in the default position.)
●Under Body position , select Shivering .(All other settings are in the default position.)
●Next to Clothing , click Add four times to add a sweatshirt, hat, pants, and parka. (All other settings
in default position.)
Factor Initial body temp.Body temp.
after ~ one hourEffect of factor on body temperature
(increase/decrease/same)
Standing still 99 ℉ 97 decreased
Exercising 99 ℉ 100 increase
Sweating 99 ℉ 95 decrease
Shivering 99 ℉ 99 same
Adding clothing 99 ℉ 99 same
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? Exercising
B.Why do you think this process raises body
temperature?Muscle cells generate heat
Student Exploration: Human Homeostasis
username: student20.21
password: shsbio
Directions: Follow the instructions to go through the simulation. Respond to the questions and
prompts in the orange boxes.
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?
If it gets to cold a thermostat automatically turns the heat on
2.What does a thermostat do if it gets too hot?
If it gets to hot a thermostat automatically turns the air conditioning on
3.How do our bodies sometimes act like a thermostat?
To make us warmer our bodies shiver, and to make us colder our bodies sweat.
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. andBody temp.
thermometers representing the air temperature and body temperature.
What is the initial air temperature?
0 C/ 32 F
1.What is the initial body temperature?
37 C/ 99 F
2.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: increase
Activity A:
Body temperatureGet 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?
The body's temperature is 36 C/ 98 F
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 are in the default position.)
●Set the Sweat level to 70%. (All other settings are in the default position.)
●Under Body position , select Shivering .(All other settings are in the default position.)
●Next to Clothing , click Add four times to add a sweatshirt, hat, pants, and parka. (All other settings
in default position.)
Factor Initial body temp.Body temp.
after ~ one hourEffect of factor on body temperature
(increase/decrease/same)
Standing still 99 ℉ 97 decreased
Exercising 99 ℉ 100 increase
Sweating 99 ℉ 95 decrease
Shivering 99 ℉ 99 same
Adding clothing 99 ℉ 99 same
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? Exercising
B.Why do you think this process raises body
temperature?Muscle cells generate heat
