Exhalation is typically a passive process during quiet breathing, where the diaphragm and intercostal muscles relax, allowing air to flow out of the lungs due to elastic recoil. However, during vigorous activities or certain conditions, exhalation becomes an active process involving the contraction of abdominal and internal intercostal muscles to forcefully expel air, facilitating faster and deeper breathing.
Exhalation is normally a passive process but it can also be an active process. Explain this statement in a short form
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