Homeostasis Lab Write-Up

Topics: Perspiration, Muscle, Human skin color Pages: 7 (1004 words) Published: October 23, 2014

Homeostasis Lab:

The Effects of Exercise on Homeostasis

Purpose:

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

Hypothesis:

If a subject walks up and down a flight of stairs for eight minutes, then they start to sweat more, their heart rate, body temperature, and breathing rate will increase, and there will be a change in their skin color on their arms and face, because the body will be trying to maintain homeostasis.

Materials:

You will need…

-An iPhone with the apps "Body Temperature" and "Heart Rate"

-A pencil

-A stopwatch

-A stairwell

-An instruction packet

Introduction:

Your body is always trying to maintain a state of balance known as homeostasis. When you exercise, you generate a wide range of effects on the systems of your body. It strives to help create enough energy to continue exercising as well as help the body recover afterwards. This state of energy creation and use has many effects on your body’s homeostasis including increased breathing, heart rate, and sweat rate and a change in external body temperature and skin color on the arms and face. In this lab, 1 member of each group shall be the subject who will exercise for 8 minutes by walk up and down a flight of stairs. The subject’s breathing rate, heart rate, perspiration level, external temperature, and skin color on the arms and face will be recorded at rest, 2 minutes, 4 minutes, 6 minutes, and 8 minutes, and 2 minutes after exercise has stopped.

Procedure:

1.Gather your materials.

2.Record the resting observations and values of your subject for each of the 5 parameters (Normal skin color of hands and face, normal perspiration level, resting breathing rate (30 seconds x2), external body temperature, resting heart rate (30 seconds x2).

3.Have the subject do an appropriate warm up session to avoid muscle injury.

4.Have your subject begin to walk up and down the stairwell.The subject should exercise at a level they can maintain for the entire 8 minutes.

5.Take your subjects parameter readings at the 2, 4, 6, and 8 minute time markers. Be sure to take final readings 2 minutes after your subject has stopped exercising.

6.Record all of your parameters in the table provided.

Data:

Body Color (normal, patchy, flushed)

Perspiration Level (sweating or not, mild, medium, high)

Body Temperature (celsius)

Heart Rate (beats/min)

Breathing Rate (breaths/min)

Rest

normal

none

37.05556

66

23

After 2 min of exercise

normal

none

36.6667

64

34

After 4 min of exercise

patchy

mild

37.16667

62

26

After 6 min of exercise

patchy

medium

36.88889

145

28

After 8 min of exercise

flushed

medium

37.2222

145

34

Rest for 2 min after exercise

patchy

mild

37.16667

81

25

Analysis:

Body Temperature (celsius)

Duration of Exercise (minutes)

The body temperature of the subject stayed consistent within the duration of exercise, fluctuating less than a degree each time it was recorded.

Heart Rate (beats/min)

Duration of Exercise (minutes)

After the first 2 minutes of exercise, the heart rate of the subject went down 2 beats/min and it went down another 2 beats/min when it was recorded after 4 minutes of exercise. At the 6 minute mark, the subject’s heart rate increased by 73 beats/min and continued to beat at 145 beats/min until we recorded the resting heart rate 2 minutes after exercising at 81 beats/min.

Breathing Rate (breaths/min)

Duration of Exercise (minutes)

The subject’s breathing rate fluctuated frequently, going from 23 breaths/min, up to 34 breaths/min, down to 26 breaths/min, up to 28 breaths/min, back to 34 breaths/minute, and then down to 25 breaths/minute.

The subject’s recorded resting body color was normal and...
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