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Questions and Answers
Which muscles are involved in passive expiration?
Which muscles are involved in passive expiration?
- Greater and small chest scalenes and sterno-cleido-mastoids
- Internal intercostal muscle and abdominal muscles of the forward wall (correct)
- External intercostal muscle and diaphragm
- Lifted thorax elastic resistance and pressure organs of a belly cavity
What is the role of alveolar surfactant?
What is the role of alveolar surfactant?
- Interferes with an atelectasis
- Possesses bacteriostatic effect
- Regulates speed of blood flow in lungs
- Decreases surface tension during expiration (correct)
What factors lead to passive expiration?
What factors lead to passive expiration?
- Lifted thorax elastic resistance and elastic resistance of costal cartilages of a thorax (correct)
- Pressure organs of a belly cavity and external intercostal muscle the diaphragm
- Surfactant and water pairs the gas
- Contraction of abdominal muscles of a wall and peristaltic contractions of the small intestine
Which muscles are involved in active expiration?
Which muscles are involved in active expiration?
What does the surface tension in lungs regulate?
What does the surface tension in lungs regulate?
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