Multiple choice

Which of the following is incorrect regarding the different steps of respiration?

  1. Breathing or pulmonary ventilation facilitates intake of alveolar air and expulsion of atmospheric air.

  2. Diffusion of gases takes place across alveolar membrane.

  3. Oxygen is transported to the tissue by blood.

  4. Diffusion of O2 and CO2 takes place between blood and tissues.

  5. Catabolism leads to utilisation of O2 by the cells and the release of CO2.
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A Correct answer
Explanation

Breathing or pulmonary ventilation facilitates intake of atmospheric air and expulsion of alveolar air.

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