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Questions and Answers
What happens to the volume of the thoracic cavity when the inspiratory muscles relax?
What happens to the volume of the thoracic cavity when the inspiratory muscles relax?
- Increases
- Vibrates
- Stays the same
- Decreases (correct)
According to Boyle’s law, what happens to the pressure within the lungs when lung volume decreases?
According to Boyle’s law, what happens to the pressure within the lungs when lung volume decreases?
- Fluctuates
- Decreases
- Increases (correct)
- Stays the same
During passive expiration, why does air move out of the lungs?
During passive expiration, why does air move out of the lungs?
- Due to lung expansion
- Due to increase in lung volume
- Due to pressure gradient (correct)
- Due to muscle contraction
Which muscles are primarily used during expiration when airway resistance is increased?
Which muscles are primarily used during expiration when airway resistance is increased?
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Which muscle compresses the abdominal cavity and helps push air out of the lungs?
Which muscle compresses the abdominal cavity and helps push air out of the lungs?
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What is the primary function of extrinsic muscles related to respiration?
What is the primary function of extrinsic muscles related to respiration?
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Which muscle pulls the ribs downward and inward during expiration?
Which muscle pulls the ribs downward and inward during expiration?
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What happens to the lung-chest wall system after inspiration?
What happens to the lung-chest wall system after inspiration?
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What do extrinsic muscles have one attachment to?
What do extrinsic muscles have one attachment to?
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Which muscle helps in movement of the rib cage for respiration?
Which muscle helps in movement of the rib cage for respiration?
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