Tissue respiration is a process by which

Options

A. Carbohydrate are synthesized
B. Proteins are broken down
C. Fat molecules are metabolized
D. Energy is liberated

Answer

**Step-by-Step Text Solution:**

1. **Understanding Tissue Respiration**: Tissue respiration, also known as internal respiration, is a crucial biochemical process that occurs within the cells, specifically in the mitochondria. It involves the breakdown of nutrients to release energy.

2. **Types of Respiration**: There are two main types of respiration:
- **External Respiration**: This occurs in the lungs and involves the exchange of gases (oxygen and carbon dioxide) between the atmosphere and the blood.
- **Internal Respiration (Tissue Respiration)**: This occurs at the cellular level, where oxygen is used to break down glucose (or other nutrients) to produce energy.

3. **Role of Mitochondria**: The mitochondria are often referred to as the "powerhouse of the cell" because they are the site where tissue respiration takes place. During this process, glucose is oxidized, and energy is released in the form of ATP (adenosine triphosphate).

4. **Energy Liberation**: The primary outcome of tissue respiration is the liberation of energy. This energy is essential for various cellular activities and functions.

5. **Conclusion**: Among the options provided in the question, the correct answer is that tissue respiration is a process by which energy is liberated.

**Final Answer**: The correct answer is "the energy is liberated."

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