Residual Volume: Air After Forcible Expiration — NEET Biology
✅ Asked in NEET 2024Residual Volume (RV): Volume of air remaining in the lungs even after a forcible expiration. This averages 1100 mL to 1200 mL.
Residual Volume (RV) is the air that remains in the lungs even after maximum forced expiration, averaging 1100-1200 mL. This air cannot be expelled voluntarily and is crucial for continuous gas exchange. Students often confuse RV with other lung volumes like expiratory reserve volume (ERV), which CAN be expelled. The key distinction is that RV is trapped air due to airway collapse during forced expiration, while ERV is air that can be forcibly breathed out. Remember: RV is unavoidable and remains always; it prevents lung collapse and maintains alveolar function between breaths.
This paragraph was tested 2 times in NEET.
Match List-I with List-II: List-I List-II A. Residual Volume B. Vital Capacity C. Expiratory Capacity D. Tidal Volume I. Volume of air inspired or expired during normal respiration II. Total volume of air expired after normal inspiration III. Maximum volume of air that can be breathed in after forced expiration IV. Volume of air remaining in lungs after forcible expiration Which of the following is the correct match? (NEET 2024 Re)
Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of: NEET 2017
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