Lab 7: Respiratory System Mechanics

1 .       Refer to Activity 1: Measuring Respiratory Volumes. Does the expiratory reserve volume include tidal volume? 

2 .       What is expiratory reserve volume? 

3 .       Refer to Activity 2: Examining the Effect of Changing Airway Resistance on Respiratory Volumes. What happened to the FEV1 (%) as the radius of the airways was decreased? 

4 .       What is the FEV1 (%)? 

5 .       Refer to Activity 3: Examining the Surfactant. How did the airflow change when surfactant was applied? 

6 .       How would you explain the effects of surfactant on airflow?  

7 .       Why do premature infants have trouble breathing? 

8 .       Refer to Activity 4: Investigating Intrapleural Pressure. What happened to the lung in the left side of the bell jar, when the valve was opened? 

9 .       How did the pressure in the left lung differ from that in the right lung, after the valve was opened? Choose all that apply: 

10 .       What caused the left lung to deflate? Choose all that apply: 

11 .       How did the total airflow in this trial compare with that in the previous trial in which the pleural cavities were intact? 

12 .       What would happen if the two lungs were in a single large cavity instead of separate cavities? 

13 .       What happened to the deflated lungs? 

14 .       Explain why the lungs do not inflate when the valve is closed. 

15 .       Why did the lung function in the deflated (left) lung return to normal after you clicked Reset? 

16 .       Refer to Activity 5: Exploring Various Breathing patterns. What happened to the PCO2 during rapid breathing? 

17 .       How would you explain a decrease in PCO2during rapid breathing? 

18 .       Refer to Activity 5: Rebreathing. What happens to PCO2 over the course of the rebreathing activity? 

19 .       Refer to Activity 5: Breath Holding. What happened to the PCO2 during breath holding? 

20 .       Following breath holding, what happened to the breathing pattern when normal respirations resumed? 

Some questions in this exercise may have more than one correct answer. And answer choices in this exercise are randomized and will appear in a different order each time the page is loaded.

Copyright © 1995-2011 by Benjamin Cummings A division of Pearson Education Legal Disclaimer