Multiple choice

Which of the following statements is correct about ventilation and gaseous exchange of mammals?

  1. Inspired air is dried in the nasal cavity.

  2. The anatomical dead space is independent of the tidal volume.

  3. In an upright lung, the alveolar ventilation is maximum at the base.

  4. The ventilation ratio for an organism in a sitting position decreases with distance above the base of the lung.

  5. The anatomical dead space is the volume of air taken in during a breath that does not enter the alveoli.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

It is the correct statement as the dead space is the volume of air which is inhaled but does not take part in the gas exchange. It either remains in the conducting airways or reaches alveoli that are not perfused or poorly perfused.

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