The blood concentration of glucose in a normal healthy individual is

Options

A. 4.0-5.0 mM
B. 4.5-5.5 mM
C. 5.0-5.5mM
D. 4.5-5.0 mM

Explanation

To determine the blood concentration of glucose in a normal healthy individual, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the normal blood concentration of glucose in a healthy individual.

2. **Identify the Options**: The options provided are:
- Option 1: 4 to 5 millimolar (mM)
- Option 2: 4.5 to 5.5 mM
- Option 3: 5 to 5.5 mM
- Option 4: 4.5 to 5 mM

3. **Recall Normal Values**: It is important to know the normal range of glucose concentration in the blood. Generally, the normal blood glucose concentration is around 4.5 to 5.5 mM.

4. **Analyze Each Option**:
- **Option 1 (4 to 5 mM)**: This range is slightly lower than the typical normal range.
- **Option 2 (4.5 to 5.5 mM)**: This range fits within the normal range.
- **Option 3 (5 to 5.5 mM)**: This range is also within the normal range but slightly higher.
- **Option 4 (4.5 to 5 mM)**: This range is at the lower end of the normal range.

5. **Select the Best Option**: The most accurate representation of the normal blood glucose concentration is Option 2 (4.5 to 5.5 mM), as it encompasses the typical range for healthy individuals.

6. **Conclusion**: Therefore, the correct answer is Option 2: 4.5 to 5.5 millimoles per liter.