About 400 million haemoglobin molecules are destroyed in our body every

Options

A. Minute
B. Second
C. Hour
D. Day

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question states that about 400 million hemoglobin molecules are destroyed in our body. We need to determine the time frame for this destruction—whether it's every minute, second, hour, or day.

2. **Analyzing Red Blood Cells (RBCs)**: Each red blood cell contains hemoglobin, which is rich in iron. The lifespan of red blood cells is limited, and they eventually become old and damaged.

3. **Role of Macrophages**: Macrophages in the body are responsible for removing old and damaged red blood cells. They primarily perform this function in the spleen and liver.

4. **Breakdown of Hemoglobin**: Once the macrophages destroy the red blood cells, the hemoglobin within them is broken down into two components: heme and globin.

5. **Further Breakdown of Heme**: The heme component is further broken down into iron and porphyrin. The porphyrin is then catabolized into bile pigments, such as bilirubin and biliverdin.

6. **Breakdown of Globin**: The globin portion of hemoglobin is hydrolyzed into amino acids, which can be reused by the body.

7. **Conclusion**: Based on the information provided, it is stated that approximately 400 million hemoglobin molecules are destroyed every second. Therefore, the correct answer is "every second."

**Final Answer**: About 400 million hemoglobin molecules are destroyed in our body every second.

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