Pulmonary Capacities from Volumes — NEET Biology
📚 Practice ConceptBy adding up a few respiratory volumes described above, one can derive various pulmonary capacities, which can be used in clinical diagnosis.
Which of the following statements regarding the utility and measurements of a spirometer are correct? S1: Spirometer is utilized for the direct measurement of Tidal Volume (TV) during normal respiration. S2: Residual Volume (RV), which is the air remaining in the lungs even after a forcible expiration, can be accurately determined by a spirometer. S3: Inspiratory Capacity (IC) and Expiratory Capacity (EC) can be computed from the volumes obtained directly through spirometry. S4: Functional Residual Capacity (FRC) represents the volume of air remaining in the lungs after a normal expiration and is directly measurable via spirometry. S5: Spirometry provides critical data for the clinical assessment of pulmonary functions, aiding in the diagnosis of various respiratory disorders.
View solution & NCERT explanation
Correct answer: B — S1, S3 and S5 are correct
The core concept tested is the function and limitations of a spirometer in measuring respiratory volumes and capacities. S1: Correct. Tidal Volume (TV) is the volume of air inspired or expired during a normal respiration, which can be directly measured by a spirometer. S2: Incorrect. Residual Volume (RV) is the volume of air remaining in the lungs even after a forcible expiration, but it cannot be measured directly by a spirometer. S3: Correct. Inspiratory Capacity (IC = TV + IRV) and Expiratory Capacity (EC = TV + ERV) are derived capacities whose components (TV, IRV, ERV) can be measured by a spirometer, thus allowing for their computation. S4: Incorrect. Functional Residual Capacity (FRC = ERV + RV) cannot be directly measured by a spirometer because it includes Residual Volume (RV), which is not spirometrically measurable. S5: Correct. Spirometry helps in clinical assessment of pulmonary functions, which is crucial for the diagnosis of various respiratory disorders. Based on the analysis, statements S1, S3, and S5 are correct.
What does NCERT say about By adding up few?
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Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.