Lactic acid is produced quite often in human

Options

A. Red muscles
B. Cardiac muscles
C. Involutary muscles
D. White muscles.

Answer

**Step-by-Step Solution:**

1. **Understanding the Context**: Lactic acid is produced in the human body during certain conditions, particularly during intense physical activity when oxygen levels are low.

2. **Anaerobic Respiration**: When muscles are engaged in heavy exercise, they may not receive enough oxygen. In such cases, the body resorts to anaerobic respiration to generate energy.

3. **Incomplete Breakdown of Glucose**: Anaerobic respiration involves the incomplete breakdown of glucose. This process does not fully oxidize glucose, leading to the production of lactic acid as a byproduct.

4. **Energy Yield**: The energy yield from anaerobic respiration is significantly lower than that from aerobic respiration. Specifically, anaerobic respiration releases only about 5% of the energy that aerobic respiration would yield from the same amount of glucose.

5. **Waste Product**: The primary waste product of this anaerobic process is lactic acid. In contrast, aerobic respiration produces carbon dioxide and water as waste products.

6. **Accumulation of Lactic Acid**: Lactic acid tends to accumulate in the muscles, particularly in the red muscles (skeletal muscles), which are rich in mitochondria and are responsible for producing energy during physical activity.

7. **Conclusion**: Therefore, the correct answer to the question regarding where lactic acid is produced in the human body is the red muscles.

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