Lactic acid deposition leads to

Options

A. Tetany
B. Muscle fatigue
C. Muscle strain
D. Symphyses

Answer

### Step-by-Step Solution:

1. **Understanding Lactic Acid Deposition**:
- Lactic acid deposition occurs when there is an accumulation of lactic acid in the muscles, typically after intense or prolonged exercise.
- This happens because during strenuous activity, the body’s demand for oxygen exceeds the supply, leading to anaerobic respiration.

2. **Anaerobic Respiration**:
- In the absence of sufficient oxygen, the body converts pyruvic acid (produced from glucose during glycolysis) into lactic acid.
- This conversion is facilitated by the enzyme lactic acid dehydrogenase.

3. **Effects of Lactic Acid Accumulation**:
- The accumulation of lactic acid in the muscles leads to muscle fatigue.
- Muscle fatigue is characterized by a feeling of tiredness and reduced ability to perform physical activities.

4. **Analyzing the Options**:
- **Tachy**: Incorrect, as this refers to a rapid heart rate often due to electrolyte imbalance or low calcium levels.
- **Muscle Fatigue**: Correct, as it is directly related to lactic acid accumulation.
- **Muscle Strain**: Incorrect, as this refers to the pulling or tearing of muscle or tendon, not directly related to lactic acid.
- **Symphysis**: Incorrect, as this term refers to a type of joint and is unrelated to muscle fatigue or lactic acid.

5. **Conclusion**:
- The correct answer to the question "Lactic acid deposition leads to" is **muscle fatigue**.