Question

Inspiratory Reserve Volume (IPV) is
A. 500ml
B. 2500-3000ml
C. 1100ml
D. 4500-5000ml

Answer 1

Hint:-Respiratory volumes are defined by the quantity of air which our lungs can hold or expel under different conditions. Four standard lung volumes are Tidal Volume (TV), Inspiratory Reserve Volume (IRV), Expiratory Reserve Volume (ERV), and Residual Volume (RV).

Complete Answer:-1. Tidal Volume (TV): During normal breathing, the volume of air inspired or expired is known as tidal volume. Its value is approximately 500ml.
2. Inspiratory Reserve Volume (IRV): It is defined as the additional or extra volume of air a person can inspire by forceful inspiration. This volume averages 2500-300ml.
3. Expiratory Reserve Volume (ERV): It is defined as the additional or extra volume of air, a person can expire by forceful expiration. This volume averages 1000ml-1100ml.
4. Residual Volume (RV): The volume of air that remains in the lungs even after the forceful expiration. It is about 1100ml-1200ml.

Therefore, the answer is (B)

Note:- The Sum of two or more respiratory volumes is called respiratory capacities.
1. Inspiratory Capacity (IC): It is the total volume of air inspired by a person after a normal expiration. Tidal volume and inspiratory reserve volume constitute the inspiratory capacity.
2. Expiratory Capacity (EC): after a normal inspiration, the total volume of air a person can expire is known as expiratory capacity. Tidal volume and expiratory reserve volume constitute the expiratory capacity.
3. Functional Residual Capacity (FRC): It is defined as the volume of air that will remain in the lungs after a normal expiration. This includes expiratory reserve volume and residual volume.
4. Vital capacity (VC): It is defined as the maximum volume of air a person can breathe in after a forceful expiration or the maximum volume of air a person can breathe out after a forceful inspiration. This includes expiratory reserve volume, tidal volume, and inspiratory reserve volume.
5. Total Lung capacity (TLC): It is defined as the total volume of air present in the lungs and the respiratory passage after a maximum inspiration. It includes residual volume, expiratory reserve volume, tidal volume, and inspiratory reserve volume.
With the exception of FRC, RV, and TLC, all other lung volumes and capacities can be measured with the help of a simple spirometer.