Question

Listed below are four respiratory capacities (A to D) and four jumbled respiratory volumes of a normal human adult.

	Respiratory capacities	Respiratory volumes
(A)	Residual volume	1) 2500 mL
(B)	Vital capacity	2) 3500 mL
(C)	Inspiratory reserve volume	3) 1200 mL
(D)	Functional residual capacity	4) 4500 mL

Which one of the following is the correct matching of two capacities and volumes?

• A. B- 1, A- 3
• B. B- 2, A- 3
• C. A- 3, D- 1
• D. None of the above

Answer 1

The correct option is C A- 3, D- 1

Residual volume is the volume of air remaining in the lungs after a maximal exhalation. Functional residual capacity is the volume of gas remaining in the lungs at the end expiratory position. The residual volume is about 1.2 litres and inspiratory capacity is about 2.3- 2.5 litres.