Which one of the following salts predominates in bone matrix?

Options

A. Sodium chloride
B. Magnesium phosphate
C. Calcium phosphate
D. Sodium carbonate

Answer

**Step-by-Step Solution:**

1. **Identify the Options Given:**
The question presents four options: Sodium Chloride, Calcium Phosphate, Magnesium Phosphate, and Sodium Carbonate.

2. **Evaluate Sodium Chloride:**
Sodium Chloride (NaCl) is commonly known as table salt. It is not a component of bone matrix. Bones are not made of NaCl, as they do not provide the structural properties needed for bones.

**Hint:** Consider the role of sodium chloride in the body and its common uses.

3. **Evaluate Calcium Phosphate:**
Calcium Phosphate is a key component of bone. It contributes to the hardness and rigidity of bones, making them strong. The matrix of bone is primarily composed of Calcium Phosphate, which is essential for bone structure.

**Hint:** Think about what gives bones their strength and rigidity.

4. **Evaluate Magnesium Phosphate:**
Magnesium Phosphate does not play a significant role in the composition of bone matrix. Instead, magnesium is more involved in other bodily functions such as supporting the immune system and regulating blood pressure.

**Hint:** Reflect on the functions of magnesium in the body versus its structural role in bones.

5. **Evaluate Sodium Carbonate:**
Sodium Carbonate is not found in the body and is primarily used in industrial applications, such as in soap. It does not contribute to the formation of bone matrix.

**Hint:** Consider the natural occurrence of the substances and their relevance to bone structure.

6. **Conclusion:**
After evaluating all the options, it is clear that Calcium Phosphate predominates in bone matrix. It is responsible for the hardness and structural integrity of bones.

**Final Answer:** Calcium Phosphate.

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