Question

Study the following statements about breathing.

A. It is a process which provides oxygen to the body.

B. In this process water is produced in the cell.

C. This process helps the body to get rid of carbon dioxide.

D. In this process food breaks down to release energy.

The combination of statements that gives the correct functions of breathing is:

1. A and C only
2. C and D only
3. A, B and D
4. A and B only

Answer 1

Correct Answer - Option 1 : A and C only

Concept:

Breathing:

• Breathing refers to the process of air moving into and out of the lungs.
• Breathing, in other words, is a basic give-and-take activity or simply saying just exchange of gases. 
• When we breathe, we take in oxygen-rich air from the environment and exhale carbon dioxide-rich air.
• This is a continual process that occurs throughout an organism's life.
• Inhalation is the process of taking in oxygen-rich air. Exhalation, on the other hand, refers to the process of exhaling carbon dioxide-rich air.
• One inhalation and one exhale makeup one breath.

​Respiration: 

• Breathing is not similar to respiration.
• Respiration is a chemical process whereas breathing is a physical process. 
• In respiration, processes at the cellular level are taking place.
• Here, glucose (released by complete digestion of food) is broken down into water and carbon dioxide in the presence of oxygen.
• ATP which is the energy currency is also released. 

Explanation:

• The given four statements are -
  • A. It is a process that provides oxygen to the body - True for Breathing 
  • B. In this process water is produced in the cell. - True for Respiration
  • C. This process helps the body to get rid of carbon dioxide. - True for Breathing 
  • D. In this process, food breaks down to release energy. - True for Respiration 
• Out of these statements, B and D are a part of the process of respiration and not breathing.
• Only statements A and C are correct for breathing. 

Hence the correct answer to this question is - statements A and C.