Arterial blood pressure in human beings :

Options

A. 120 and 80 mm Hg
B. 150 and 100 mm Hg
C. 50 and 100 mm Hg
D. None

Answer

### Step-by-Step Solution:

1. **Understanding Arterial Blood Pressure**:
- Arterial blood pressure is the pressure exerted by circulating blood upon the walls of blood vessels. It is typically measured in millimeters of mercury (mmHg).

2. **Normal Blood Pressure Values**:
- The normal arterial blood pressure for a healthy adult is generally recognized as 120 mmHg systolic (the pressure during heartbeats) over 80 mmHg diastolic (the pressure between heartbeats). This is often written as 120/80 mmHg.

3. **Current Guidelines**:
- According to the World Health Organization (WHO), the threshold for normal blood pressure has been updated. The new normal is considered to be 140 mmHg systolic over 90 mmHg diastolic (140/90 mmHg).

4. **Hypertension Definition**:
- Hypertension, or high blood pressure, is diagnosed when the systolic blood pressure exceeds 140 mmHg or the diastolic blood pressure exceeds 90 mmHg. This condition can lead to serious health issues, including heart disease, stroke, kidney damage, and eye problems.

5. **Conclusion**:
- Based on the information provided, the correct answer to the question regarding arterial blood pressure in human beings is 120/80 mmHg. However, it is important to note that recent guidelines suggest that values above 140/90 mmHg indicate hypertension.

### Final Answer:
- The normal arterial blood pressure in human beings is **120/80 mmHg**, but current guidelines suggest that values above **140/90 mmHg** indicate hypertension.

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