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Questions and Answers
What is the pressure existing in the pleural cavity?
What is the primary function of intrapleural pressure?
What is the significance of intra-alveolar pressure during inspiration?
What does transpulmonary pressure represent?
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What exerts suction on the fluid that lines the pleural cavity?
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During inspiration, the intra-alveolar pressure becomes positive.
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Intrapleural pressure is always positive.
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Intrapleural pressure prevents the collapsing tendency of lungs.
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Intra-alveolar pressure causes flow of air out of alveoli during expiration.
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Transpulmonary Pressure is the sum of intra-alveolar pressure and intrapleural pressure.
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Study Notes
Pressure in the Lungs
- Pressure in the pleural cavity is typically negative, ranging from -3 to -5 mmHg.
Functions of Intrapleural Pressure
- The primary function of intrapleural pressure is to prevent the collapsing tendency of lungs.
Respiration Process
- During inspiration, intra-alveolar pressure becomes negative.
- Intra-alveolar pressure causes airflow into the alveoli during inspiration.
- During expiration, intra-alveolar pressure becomes positive, causing airflow out of the alveoli.
Transpulmonary Pressure
- Transpulmonary pressure represents the sum of intra-alveolar pressure and intrapleural pressure.
Pleural Cavity
- The negative intrapleural pressure exerts suction on the fluid that lines the pleural cavity.
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Description
Test your knowledge of the pressures exerted in the thoracic cavity and lungs during respiration. Explore concepts such as intrapleural pressure, intra-alveolar pressure, and their significance in the respiratory process.
