Which of the following is not true with respect to respiratory volumes and capacity?

IC = TV + IRC

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EC = TV + ERC

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FRC = ERV + RV

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VC = RV + ERV + TV + IRV

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Solution

The correct option is D VC = RV + ERV + TV + IRV
Tidal Volume (TV): Volume of air inspired or expired during a normal respiration.
Inspiratory Reserve Volume (IRV): Additional volume of air, a person can inspire by a forcible inspiration.
Expiratory Reserve Volume (ERV ): Additional volume of air, a person can expire by a forcible expiration.
Inspiratory Capacity (IC): Total volume of air a person can inspire after a normal expiration.
IC =TV + IRV
Expiratory Capacity (EC): Total volume of air a person can expire after a normal inspiration.
EC =TV + ERV
Functional Residual Capacity (FRC): Volume of air that will remain in the lungs after a normal expiration.
FRC =ERV + RV.
Vital Capacity (VC): The maximum volume of air a person can breathe in after a forced expiration. This includes ERV, TV and IRV.
Total Lung Capacity: Total volume of air accommodated in the lungs at the end of a forced inspiration. This includes RV, ERV, TV and IRV.

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Similar questions

Q. Match column i with column II and select the correct option from the codes given below.

Column I	Column II
A. TV + ERV	(i) Expiratory capacity
B. RV + ERV + TV + IRV	(ii) Total lung capacity
C. ERV + RV	(iii) Functional residual capacity

Complete the following blanks, regarding lung volumes and capacities.
i. First lung capacity (FRC) $⟶$ ERV+RV= ________.
ii. Inspiratory capacity (IC) $⟶$ TV+IRV= ________.
iii. Vital capacity (VC) $⟶$ IC+ERV= ________.
iv. Total lung capacity $⟶$ RV+VC= ________.

Q. The total volume of air accommodated in the lungs at the end of maximum forceful inspiration includes:-

(A)

E R V + R V

(B)

T R V + E R V

(C)

T V + I R V + E R V + R V

(D)

V C + R V

Q. Match the following columns.

Column I	Column II
A. IC B. EC C. FRC D. VC	1. TV and IRV 2. TV and ERV 3. ERV and RV 4. ERV, TV and IRV

Q. Explain the terms: Vital capacity of lungs in terms of IRV (Inspiratory Reserve Volume), ERV (Expiratory Reserve Volume), TV (Tidal Volume) and RV (Residual Volume)

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