Despite lack in oxygen, which one of the following increases in a muscle cell?

Options

A. `CO_2`
B. Lactose
C. Lactic acid
D. Uric acid

Answer

To answer the question "Despite lack in oxygen, which one of the following increases in a muscle cell?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Context**: The question is asking about what happens in muscle cells when there is a lack of oxygen. This typically occurs during intense exercise when muscles are working hard and oxygen supply is insufficient.

2. **Identify the Process**: In the absence of oxygen, muscle cells undergo anaerobic respiration. This is a process that allows cells to generate energy without oxygen.

3. **Know the Byproducts**: During anaerobic respiration, glucose is not fully broken down. Instead, it undergoes an incomplete breakdown, resulting in the formation of lactic acid as a byproduct.

4. **Energy Production**: Along with lactic acid, anaerobic respiration produces a small amount of energy in the form of ATP (specifically, 2 ATP molecules per glucose molecule).

5. **Accumulation of Lactic Acid**: As lactic acid is produced during anaerobic respiration, it accumulates in the muscle cells. This accumulation is what the question is asking about.

6. **Evaluate the Options**:
- Option 1: CO2 - This does not increase significantly in anaerobic conditions.
- Option 2: Lactose - This is not relevant in this context.
- Option 3: Lactic Acid - This is the correct answer as it increases due to anaerobic respiration.
- Option 4: Uric Acid - This is a nitrogenous waste and does not increase in this context.

7. **Conclusion**: Therefore, the correct answer to the question is that lactic acid increases in muscle cells despite a lack of oxygen.

### Final Answer:
**Lactic Acid** increases in a muscle cell despite a lack of oxygen.

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