Question

___________ is the amount of air in a respiratory cycle.

• A. Air capacity
• B. Respiration capacity
• C. Lung volume
• D. None of the above

Answer 1

The correct option is C Lung volume

1. Lung volumes and lung capacities refer to the volume of air in the lungs at different phases of the respiratory cycle. The average total lung capacity of an adult human male is about 6 liters of air. Tidal Volume (TV): Volume of air inspired or expired during normal respiration. It is approx. 500 mL., i.e., a healthy man can inspire or expire approximately 6000 to 8000mL of air per minute. An average human respiratory rate is 30-60 breaths per minute at birth and decreasing to 12-20 breaths per minute in adults. Hence, the amount of air in the respiratory cycle is lung volume.
   

So, the correct answer is 'lung volume'.