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Questions and Answers
What is the significance of pulmonary surfactant in breathing?
What is the significance of pulmonary surfactant in breathing?
- It decreases lung compliance
- It increases lung elasticity
- It increases the partial pressure of oxygen in the blood
- It decreases surface tension in the alveoli (correct)
How are inspiration and expiration accomplished?
How are inspiration and expiration accomplished?
- By the contraction of the diaphragm and intercostal muscles during inspiration, and their relaxation during expiration (correct)
- By the relaxation of the abdominal muscles during inspiration, and their contraction during expiration
- By the contraction of the abdominal muscles during inspiration, and their relaxation during expiration
- By the relaxation of the diaphragm and intercostal muscles during inspiration, and their contraction during expiration
What are the factors that influence the partial pressure of blood gases and the total content of gases in the blood?
What are the factors that influence the partial pressure of blood gases and the total content of gases in the blood?
- Ventilation and perfusion (correct)
- Altitude and atmospheric pressure
- Blood pressure and heart rate
- Temperature and humidity
