Question

Respiration is the physiological process in which

• A. Breathing occurs
• B. Breathing and external respiration occurs
• C. Breathing, external respiration and cellular respiration occurs
• D. Only inspiration occurs

Answer 1

The correct option is C Breathing, external respiration and cellular respiration occurs

Physiological respiration is the complete process of respiration which includes physical and biochemical pathway. In physical pathway, there is an exchange of gasses that takes place with the help of respiratory organ i.e., lungs. In biochemical pathway, cells are involved where oxidation of food i.e. glucose takes place in mitochondria and cytoplasm in the presence of several respiratory enzymes.

So, the correct answer is option C.