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Select the correct option about pulmonar...

Select the correct option about pulmonary volume and capacities
(A) VC=IRV+TV+ERV
(B) FRC=IRV+RV
(C) IC=IRV+TV
(D) EC=ERV + RV
(E) TLC=VC+RV

A

A,B,C,E are correct

B

B,C,D,E are correct

C

A,C,E are correct

D

A,B,D are correct

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding pulmonary volume and capacities, we will analyze each option provided and determine which ones are correct based on the definitions and relationships of lung volumes and capacities. ### Step-by-Step Solution: 1. **Understanding Pulmonary Volumes:** - **Tidal Volume (TV):** The amount of air inhaled or exhaled during normal breathing (approximately 500 ml). - **Inspiratory Reserve Volume (IRV):** The additional air that can be inhaled after a normal inhalation (approximately 2500-3000 ml). - **Expiratory Reserve Volume (ERV):** The additional air that can be exhaled after a normal exhalation (approximately 1000-1100 ml). - **Residual Volume (RV):** The volume of air remaining in the lungs after a forceful exhalation (approximately 1000-1200 ml). 2. **Analyzing Each Option:** - **Option (A): VC = IRV + TV + ERV** - **Vital Capacity (VC)** is indeed calculated by adding IRV, TV, and ERV. - **Conclusion:** This option is **correct**. - **Option (B): FRC = IRV + RV** - **Functional Residual Capacity (FRC)** is calculated as ERV + RV, not IRV + RV. - **Conclusion:** This option is **incorrect**. - **Option (C): IC = IRV + TV** - **Inspiratory Capacity (IC)** is calculated as IRV + TV, which is correct. - **Conclusion:** This option is **correct**. - **Option (D): EC = ERV + RV** - **Expiratory Capacity (EC)** is calculated as TV + ERV, not ERV + RV. - **Conclusion:** This option is **incorrect**. - **Option (E): TLC = VC + RV** - **Total Lung Capacity (TLC)** is indeed calculated as VC + RV. - **Conclusion:** This option is **correct**. 3. **Final Assessment:** - The correct options are (A), (C), and (E). ### Summary of Correct Options: - (A) VC = IRV + TV + ERV - (C) IC = IRV + TV - (E) TLC = VC + RV
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