For the body system lab we got put into groups of 3 and we got assigned a body system, the one my group had was the nervous. We had to make a online poster using the website called Jamboard. We spent a day getting the needed information, then we spent a day putting it all on to the Jamboard, and on our final day we got ready to present.

The information we needed was not to complicated. We needed to find what organs the nervous system works with. We had to find how the nervous system helps maintain homeostasis. We also had to find out which other systems it worked with.

Homeostasis Lab: The Effects of Exercise on Homeostasis

Purpose

To discover the effect that various levels of exercise have on specific body parameters.

Hypothesis

Write one hypothesis describing how you predict the 5 parameters below will change as the subject exercises.

• change in skin color on arms and face

• perspiration level

• external body temperature

• heart rate

• Breathing rate

Hypothesis:

If _I_____________________(name of student exercising) exercises for several minutes, then we would expect _my blood pressure and external temperature would go up, I also expect for my skin to get red. ___________________________________________________________________________________________________________________________________________________

Materials

Thermometer, stopwatch blood pressure cuff.

Introduction

Exercise causes many homeostatic factors to kick in, in an effort to maintain internal homeostasis. How exercise affects some of these homeostatic factors can be determined by measuring and observing certain parameters.

In the following lab 1 member of your group, at a time, will exercise for 8 minutes by skipping in place or doing jumping jacks or running around the building. The parameters listed above will be recorded at rest, 2 minutes, 4 minutes, 6 minutes and 8 minutes, and 1 minute after exercise has stopped. The subject should stop just long enough for the needed measurements to be taken. ALL MEMBERS MUST HELP!!! Record all data in the table provided.

Procedure

1. Each group should obtain: a thermometer, blood pressure cuff and a stopwatch.

2. Record the RESTING observations and values of your subject for each of the 5 parameters.

   1. Record normal skin color of hands and face (i.e. pale, pink, red, etc.)

   2. Record normal perspiration level (i.e. none, mild, medium, high, etc.)

   3. Record external body temperature by placing the thermometer under the subjects arm pit for one minute (note: measurements should be taken directly from the skin).

   4. Determine the breathing rate by counting the number of breaths taken in 10 seconds and multiply by 6.

   5. Determine the heart rate by counting the number of breaths taken in 10 seconds and multiply by 6.

   6. Determine the blood pressure using the blood pressure kit. (your teacher will show you how to use it)

3. Have your subject begin to exercise. Please note your subject should be sure to exercise at a level they can maintain for the entire 8 minutes.

4. Take your subjects parameter readings using the same techniques described above at the 2, 4, 6, and 8 minute time markers. Be sure to take final readings 1 minute after your subject has stopped exercising.

5. Record all of your parameter readings in the table provided.

6. Have the next member in your group go and repeat the above steps.

7. After cleaning your thermometer, return it along with the other lab materials to the bin.

Data:

Link to Data Table

Graphs: Insert the graphs you made in the Google Sheets for each of the variables:

• Body Temperature vs. Time Exercising:

• Heart Rate vs. Time Exercising

• Breathing Rate vs. Time Exercising

• Blood Pressure vs. Time Exercising

Conclusion:

1. Read your hypothesis. Do your results support your hypothesis?

Yes

2. Why were there changes in body color and perspiration level?

Our body was heating up but at the same time it was trying to cool itself down

3. How do the changes in your body color and perspiration contribute to the maintenance of homeostasis? The change in skin color means your body is radiating heat off it’s self, and sweating is a way your body cools you down.

4. What other mechanisms does your body use to maintain its homeostasis temperature?

5. Why does an increase in heart rate and breathing rate accompany exercise?

Because it causes more blood to flow

6. How did your blood pressure change during exercise?

It stayed almost the same

7. Study your measurements after exercise has stopped. What conclusions can you make about your body’s ability to maintain homeostasis? It is very fast to cool down.

In this project we studied how our body reacts cardio. We checked our heart rate, our Breathing, our blood pressure, and our body temp. when we gathered all of our data we went into google sheet and made separate graphs for each category.

We would do some kind of exercise for two minutes and then measure everything we had to. we kept doing that three more times to collect enough data. at the end of the four periods we rested for two minutes and then measured everything again.

We learned how our body uses negative and positive feedback to maintain homeostasis.

Two things I felt that I did good on would be taking measurements, and working as a team.

Two things I can work on is time management and being a better communicator