Podcast
Questions and Answers
During inspiration (inhalation), what happens to the thoracic cavity volume?
During inspiration (inhalation), what happens to the thoracic cavity volume?
- Decreases
- Stays the same
- Becomes negative
- Increases (correct)
What controls the process of breathing (ventilation) according to Boyle's Law?
What controls the process of breathing (ventilation) according to Boyle's Law?
- Product of absolute pressure and volume (correct)
- Changes in lung volume
- Pressure gradients in the lungs
- Atmospheric pressure
What happens to the pressure inside the thoracic cavity during inspiration?
What happens to the pressure inside the thoracic cavity during inspiration?
- Stays the same
- Becomes zero
- Decreases (correct)
- Increases
In what condition would you expect the ratio of poor ventilation to good perfusion to be less than 0.8?
In what condition would you expect the ratio of poor ventilation to good perfusion to be less than 0.8?
Which muscle contracts during inspiration causing an increase in thoracic cavity volume?
Which muscle contracts during inspiration causing an increase in thoracic cavity volume?
How is gas exchange in the lungs facilitated?
How is gas exchange in the lungs facilitated?
Which part of the airways is responsible for transporting, warming, humidifying, and filtering air?
Which part of the airways is responsible for transporting, warming, humidifying, and filtering air?
Where does gaseous exchange primarily occur in the lungs?
Where does gaseous exchange primarily occur in the lungs?
Which structure is NOT part of the conducting zone of the airways?
Which structure is NOT part of the conducting zone of the airways?
What is the primary function of alveolar sacs in the lungs?
What is the primary function of alveolar sacs in the lungs?
Which step in the exchange of gases involves movement of air into and out of the lungs?
Which step in the exchange of gases involves movement of air into and out of the lungs?
In which structure do we find blood-air gas exchange in the lungs?
In which structure do we find blood-air gas exchange in the lungs?
What does the Ventilation-Perfusion (V/Q) ratio measure?
What does the Ventilation-Perfusion (V/Q) ratio measure?
What is the consequence of a V/Q ratio of zero?
What is the consequence of a V/Q ratio of zero?
In the lungs, what does 'Perfusion (Q)' refer to?
In the lungs, what does 'Perfusion (Q)' refer to?
What happens if there is good ventilation but poor perfusion in the lungs?
What happens if there is good ventilation but poor perfusion in the lungs?
What is the significance of a V/Q ratio different from 0.8 in the lungs?
What is the significance of a V/Q ratio different from 0.8 in the lungs?
How does a V/Q ratio > 0.8 impact gas exchange in the lungs?
How does a V/Q ratio > 0.8 impact gas exchange in the lungs?
