LAB 5 (7) - Exercise 7 Respiratory System Mechanics...

Exercise 7: Respiratory System Mechanics: Activity 1: Measuring Respiratory Volumes and Calculating Capacities Lab
Report
Pre-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
1. Which of the following statements describing the mechanics of breathing is false ?
2. The contraction of which of the following muscles will increase the thoracic cavity volume during inspiration?
3. At the beginning of inspiration, the
4. At the beginning of expiration, the
5. A tidal volume refers to the
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Experiment Results
Predict Question:
Predict Question: Lung diseases are often classified as obstructive or restrictive. An obstructive disease affects airflow
and a restrictive disease usually reduces volumes and capacities . Although they are not diagnostic, pulmonary function
tests such as forced expiratory volume (FEV1) can help a clinician determine the difference between obstructive and
restrictive diseases. Specifically, an FEV1 is the forced volume expired in 1 second.
In obstructive diseases such as chronic bronchitis and asthma, airway radius is decreased. Thus, FEV1 will
,
Stop & Think Questions:
Which muscles contract during quiet expiration?
You correctly answered: d. None of these muscles contract during quiet expiration.
6. Minute ventilation is the amount of air that flows into and then out of the lungs in a minute. Minute ventilation (ml/min) =
TV (ml/breath) x BPM (breaths/min).
Enter the minute ventilation in the field below and then click Submit to record your answer in the lab report.
You answered: 7500 ml/min
11. 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 5.00 mm in the field below and then click Submit to record your answer in the
lab report.