Question

The process of gaseous exchange in lungs between air and blood is called

• A. Respiration
• B. Transpiration
• C. External respiration
• D. Internal respiration

Answer 1

The correct option is C

External respiration

The correct option is C:

Explanation of the correct option:

1. External respiration is the process of gaseous exchange between air and the blood in the alveoli of the lungs.
2. During this process, the oxygen from the alveolar air diffuses into the blood.

Explanation for incorrect options:

Option A:

1. Respiration is the process of breakdown of glucose by oxygen to release carbon dioxide, water vapor and energy.
2. It occurs in three phases - External, internal and cellular respiration

Option B:

1. Transpiration is the process by which water escapes from the aerial parts of the plant like leaves, stems, etc.

Option D:

1. Internal respiration is the process of gaseous exchange between blood and body cells.
2. In this process, the oxygen from the blood diffuses into the tissues.

Final answer: The process of gaseous exchange in lungs between air and blood is called external respiration.