A useful way to express fev1 is as a percentage of

12. A useful way to express FEV1 is as a percentage of the forced vital capacity (FVC). Using the FEV1 and FVC values
from the data grid, calculate the FEV1 (%) by dividing the FEV1 volume by the FVC volume (in this case, the VC is equal to
the FVC) and multiply by 100%.
Enter the FEV1 (%) for an airway radius of 3.00 mm in the field below and then click Submit Data to record your answer in
the lab report.
You answered: 70
Experiment Data:
Radius Flow
(L/min)
TV ERV IRV RV VC FEV1 TLC Breath Rate
5.00 7485 499 --- --- --- --- --- --- 15
5.00 7500 500 1200 3091 1200 4791 3541 5991 15
4.50 4920 328 787 2028 1613 3143 2303 4756 15
4.00 3075 205 492 1266 1908 1962 1422 3871 15
3.50 1800 120 288 742 2112 1150 822 3262 15
3.00 975 65 156 401 2244 621 436 2865 15

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Post-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
1. To calculate a person's vital capacity, you need to know the TV, ERV, and
2. Measuring a person's FVC means that you are measuring
3. Measuring a person's FEV1 means that you are measuring
4. For a person suffering an asthma attack, inhaler medications are expected to
5. Which of the following values does not include the ERV?

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Review Sheet Results
1. What would be an example of an everyday respiratory event the ERV simulates?
2. What additional skeletal muscles are utilized in an ERV activity?
3. What was the FEV1 (%) at the initial radius of 5.00 mm?
4. What happened to the FEV1 (%) as the radius of the airways decreased? How well did the results compare with your
prediction?
5. Explain why the results from the experiment suggest that there is an obstructive, rather than a restrictive, pulmonary
problem.

Name: Karen Brito
Exercise 7: Respiratory System Mechanics: Activity 2: Comparative Spirometry Lab Report
Pre-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.