Class 11 · Breathing and Exchange of Gases

Expiratory Capacity: TV + ERV — NEET Biology

✅ Asked in NEET 2024
📖 NCERT Source

Expiratory Capacity (EC): Total volume of air a person can expire after a normal inspiration. This includes tidal volume and expiratory reserve volume (TV+ERV).

NCERT Biology · Class 11 · Chapter 14 · Paragraph 22
How NTA Uses This Concept

Expiratory Capacity (EC) is the total air exhaled after normal inspiration, calculated as Tidal Volume (TV) + Expiratory Reserve Volume (ERV). NTA tests this by asking students to identify what EC includes or to distinguish it from other lung volumes like Vital Capacity. The common mistake is confusing EC with Residual Volume (RV) or thinking it includes air that cannot be expelled. Remember: EC only measures air that CAN be breathed out after normal inspiration—it excludes residual volume. Since this appeared in 2019 and 2024 NEET papers, expect similar definition-based or calculation questions in upcoming exams.

Solve This NEET Question

This paragraph was tested 2 times in NEET.

Q1 of 2NEET 2024

Match List I with List II: (NEET 2024) A. Expiratory Capacity B. Functional Residual Capacity C. Vital Capacity D. Inspiratory Capacity I. ERV + TV + IRV II. Tidal Volume + Expiratory Reserve Volume III. Tidal Volume + Inspiratory Reserve Volume IV. Expiratory Reserve Volume + Residual Volume

Q2 of 2NEET 2019

Tidal volume and Expiratory reserve volume of an athlete is 500 mL and 1000 mL respectively. What will be his Expiratory capacity if the residual volume is 1200 mL? NEET 2019

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