Given below is the definition of respiration with a few blanks to be filled in. Write suitable words in the blanks:

Respiration is a process of releasing …………… by breaking down …………… for carrying out …………… processes.

Write the overall chemical equation representing the above definition of respiration.

Give two examples of life activities which need energy.

State whether the following statements are true (T) or false (F):

1. Strenuous physical exercise may cause fatigue due to accumulation of CO₂ in the blood.
2. No CO₂ is produced in anaerobic respiration in the human body.
3. Breathing and gaseous transport are one and the same thing.
4. CO₂ is transported to the lungs by the blood in two forms: as bicarbonates and as carbamino-haemoglobin.
5. Tissue respiration means chemical changes occurring inside the cell.