Podcast
Questions and Answers
During normal inspiration, what is the average pleural pressure?
During normal inspiration, what is the average pleural pressure?
- -7.5 cm of water (correct)
- -1 cm of water
- 0 cm of water
- -5 cm of water
In normal inspiration, what happens to the pleural pressure from -5 to -7.5 cm of water?
In normal inspiration, what happens to the pleural pressure from -5 to -7.5 cm of water?
- Remains constant
- Increases (correct)
- Fluctuates
- Decreases
What is the value of alveolar pressure during normal inspiration?
What is the value of alveolar pressure during normal inspiration?
- +1 cm of water
- +7.5 cm of water
- -1 cm of water (correct)
- -7.5 cm of water
How does the alveolar pressure change during expiration?
How does the alveolar pressure change during expiration?
What is the effect of alveolar radius on pressure during inspiration?
What is the effect of alveolar radius on pressure during inspiration?
To pull air into the alveoli during inspiration, what must the pressure in the alveoli be in relation to atmospheric pressure?
To pull air into the alveoli during inspiration, what must the pressure in the alveoli be in relation to atmospheric pressure?
What happens to the pressure in occluded alveoli due to surface tension?
What happens to the pressure in occluded alveoli due to surface tension?
How does the radius of an alveolus affect the pressure generated by surface tension?
How does the radius of an alveolus affect the pressure generated by surface tension?
What is the significance of having small alveoli in premature babies?
What is the significance of having small alveoli in premature babies?
What happens to lung expansibility when the thoracic cage is considered?
What happens to lung expansibility when the thoracic cage is considered?
How is the compliance of the entire pulmonary system measured?
How is the compliance of the entire pulmonary system measured?
What effect does a half-normal radius have on alveolar pressure caused by surface tension?
What effect does a half-normal radius have on alveolar pressure caused by surface tension?
What is the pressure in all parts of the respiratory tree, including the alveoli, when the glottis is open and no air is flowing?
What is the pressure in all parts of the respiratory tree, including the alveoli, when the glottis is open and no air is flowing?
What does transpulmonary pressure represent?
What does transpulmonary pressure represent?
Which term describes the extent to which the lungs will expand for each unit increase in transpulmonary pressure?
Which term describes the extent to which the lungs will expand for each unit increase in transpulmonary pressure?
What is the purpose of a compliance diagram of the lungs as described in the text?
What is the purpose of a compliance diagram of the lungs as described in the text?
In what direction do the elastic forces of the lungs tend to move during respiration?
In what direction do the elastic forces of the lungs tend to move during respiration?
How would an increase in alveolar radius affect pressure in occluded alveoli?
How would an increase in alveolar radius affect pressure in occluded alveoli?
