2. (a) State and explain the changes in the lung volume, the
alveolar pressure (Palv) and
airflow...
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Medical Sciences
2. (a) State and explain the changes in the lung volume, thealveolar pressure (Palv) and airflow between the atmosphere and the lungs during passiveexhalation.
(b) What happens to the ventilation rate during exercise?Briefly describe and explain how the chemoreceptors work during exercise.
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Answer 2 a Exhalation is a passive process ie no energy is required during exhalation During passive exhalation the diaphragm and intercostal muscles relaxes and the lungs recoil due to elasticity of lungs which causes decreases the lung volume This causes increase in interpulmonary pressure
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