Question

State whether true or false:
Respiration and breathing are synonymous.

• A. Breathing
• B. Photosynthesis

Answer 1

The correct option is B

Photosynthesis

Breathing and respiration are not synonymous; breathing is a part of respiration. Breathing refers to the intake of atmospheric oxygen followed by the release of carbon dioxide rich alveolar air. Respiration involves the following steps:
(i) Breathing or pulmonary ventilation
(ii) Diffusion of gases (oxygen and carbon dioxide) across alveolar membrane
(iii) Transport of gases by the blood
(iv) Diffusion of oxygen and carbon dioxide between blood and tissues
(v) Utilisation of oxygen by the cells for catabolic reactions and the resultant release of carbon dioxide