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Questions and Answers
What is the normal intra-alveolar pressure during expiration?
What is the normal intra-alveolar pressure during expiration?
- Equal to atmospheric pressure
- More than atmospheric pressure
- Less than atmospheric pressure (correct)
- Varies with lung volume
What is the primary function of surfactant in the lungs?
What is the primary function of surfactant in the lungs?
- To facilitate lung expansion during inspiration
- Both (a) and (b) (correct)
- To increase surface tension in the alveoli
- To prevent lung collapse during expiration
Which type of hypoxia is caused by a deficiency of hemoglobin?
Which type of hypoxia is caused by a deficiency of hemoglobin?
- Stagnant hypoxia
- Anemic hypoxia (correct)
- Histotoxic hypoxia
- Hypoxic hypoxia
Which type of hypoxia is caused by the inhibition of the cytochrome system due to toxic agents?
Which type of hypoxia is caused by the inhibition of the cytochrome system due to toxic agents?
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What is the cause of stagnant hypoxia?
What is the cause of stagnant hypoxia?
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What are the cells responsible for gas exchange in the alveoli called?
What are the cells responsible for gas exchange in the alveoli called?
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Which of the following is NOT a function of the lungs?
Which of the following is NOT a function of the lungs?
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Which muscle is NOT involved in forced inspiration?
Which muscle is NOT involved in forced inspiration?
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Which nerve supplies the diaphragm, the main muscle involved in respiration?
Which nerve supplies the diaphragm, the main muscle involved in respiration?
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During expiration, which muscles are primarily responsible for decreasing thoracic volume?
During expiration, which muscles are primarily responsible for decreasing thoracic volume?
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What type of process is inspiration?
What type of process is inspiration?
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