Multiple choice

The lung capacity is defined as the maximum air which can be held in the two lungs at any given time. Which among the following has minimum value?

  1. Vital capacity

  2. Expiratory reserve volume

  3. Inspiratory reserve volume

  4. Residual air

  5. Alveolar air
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Some amount of air remains in the various parts of the respiratory tract. The air in the trachea and bronchi (where no diffusion occurs) is called dead space air (350ml). The air remaining in the alveoli or air sacs is alveolar air (150ml).

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