Which energy is consumed in breathing?

Options

A. Mechanical
B. Chemical
C. Bioelectrical
D. Physical

Answer

**Step-by-Step Solution:**

1. **Understanding Breathing and Respiration:**
- Breathing is the physical process of inhaling and exhaling air, while respiration refers to the biochemical process that occurs in cells to produce energy.

2. **Identifying the Process of Respiration:**
- Respiration is often referred to as cellular respiration, which takes place in the mitochondria of cells. This process involves the breakdown of glucose (or other organic molecules) to release energy.

3. **Energy Production in Cells:**
- The energy produced during respiration is stored in the form of ATP (adenosine triphosphate), which is known as the energy currency of the cell.

4. **Chemical Changes Involved:**
- The process of respiration involves the burning of food (glucose) in the presence of oxygen. This burning is a chemical change, as it transforms the chemical structure of glucose and releases energy.

5. **Conclusion:**
- Since respiration involves chemical changes and the production of energy through the breakdown of food, the energy consumed in breathing is classified as chemical energy.

**Final Answer:**
The energy consumed in breathing is chemical energy.

---