Download Lab 37

Name _________________________ Date ________ Hour _____
Respiratory and Excretory Labs Due April 9th
Lung volume
lab
Lab 37
Due:_______________
Data Table
Analysis
HW
Due:_______________
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0 12 3 4 5
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Total Points: 15 _________
Lung Capacity Lab
The amount of air that you move in and out of your lungs while breathing normally is called TIDAL
VOLUME. This amount of air provides enough oxygen for a person who is resting. It is possible to inhale
and exhale more forcefully - the maximum amount of air moved in and out of the lungs is called the VITAL
CAPACITY. EXPIRATORY RESERVE is all the air still left in your lungs after a normal exhale. In this
activity, you will be measuring the vital capacity, expiratory reserve and the tidal volume of your own
lungs, this actual number can then be compared with a number derived from an equation that measures
vital capacity. In effect, you are measuring an actual number, based on laboratory measurements, to a
theoretical number, based on an equation. If you have any breathing difficulties (asthma or other
condition), you should not participate in this activity, instead only take the data on your lab partner.
Materials
Balloons, metric ruler, meter stick,
bathroom scale (optional)
Procedure:
1. Measuring Tidal Volume -- Stretch a round balloon
several times to stretch it out. Inhale normally and then
exhale normally into the balloon. Do not force your
breathing. Pinch the end of the balloon and measure its
diameter. Repeat this so that you have 3 total
measurements and can take the average and record in the
data table.
2. Measuring Vital Capacity - Repeat the procedure, only this
time inhale as much air as you can and exhale forcefully.
Record three measurements in the data table.
3. Measure Expiratory Reserve – Repeat the procedure, only this time exhale normally and without
inhaling as you normally would, put the balloon in your mouth and exhale all the air still left in your lungs.
Record the measurement in the data table.
4. Convert the diameters of tidal volume, vital capacity, and expiratory reserve to their lung volume in
cubic centimeters using the graph and record this in the table. Then calculate and record your average
for each of the three measurements.
Lung volume Graph
DATA TABLE
Balloon in Diameter
Tidal
Vital
Volume Capacity
Cm
Lung Volume
Expiratory
Reserve
Tidal Volume
Cm3
Vital
Expiratory
Capacity Reserve
Trial
1
2
3
4
5
Total
Average
ANALYSIS
1. Why is it important to measure tidal volume and vital capacity three times and then get an average?
2. Compare your data to other members of the class. How can you account for differences?
3. The following values were obtained through the use of a special machine called a spirometer. Note
that these are average values:
Male
Female
Vital Capacity
5000 cubic cm
4000 cubic cm
Expiratory Reserve
1200 cubic cm
1000 cubic cm
Tidal Volume
525 cubic cm
475 cubic cm
a) How does your average vital capacity compare to the value obtained by a spirometer?
b) Why might these numbers not agree?
4. A close relationship between height and vital capacity exists. Determine your actual vital capacity by
taking your height and one of the following factors: 20 for females, 22 for female athletes, 25 for
males, 29 for male athletes. (NOTE Your height in inches X 2.54 will give you your height in centimeters)
and multiplying them together. Your height in cm x factor = Calculated Vital Capacity
a) Are your calculated and experimental values (from lung lab) the same? Why or why not?
b) What is your breathing rate for one minute? (measure the number of times you breathe in or out in
one minute)
c) How much air in cubic centimeters do you inhale in one minute? (use your average tidal volume)
5. How might an athlete's vital capacity compare to a non-athlete? Explain your reasoning.
APPLICATION
1. Examine the data table of a person who entered into a training program. This person's vital capacity
was measured over a 60 day period. Use the data to construct a graph
DATA
GRAPH
Day of
Training
Vital
Capacity
0
4800
10
4840
20
4890
30
4930
40
4980
50
5180
60
5260
2. What happened to the person's vital capacity over the course of the training period?
3. What probably caused the change?
4. How might vital capacity be important to a musician?
HW for Respiration
Animal Respiration
1. What substances do heterotrophs need for cellular respiration?
14
12
13
15
2. Label the following parts
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
3. Explain the job of each part labeled above:
4. Explain internal respiration. What gas does this process deliver and which gas is picked up
in this process deliver?
5. Explain in detail what occurs at the alveoli.
6. Describe, in detail, two topics we discussed that can be harmful to the lungs.