PH of blood in arteries and veins is

Options

A. More in veins and less in arteries
B. More in arteries and less in veins
C. same
D. Not definite

Answer

To determine the pH of blood in arteries and veins, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Normal pH Range of Blood**:
- The normal pH of blood is typically maintained between 7.35 and 7.45.

2. **Identify the pH in Arteries**:
- Arterial blood, which is oxygenated, generally has a pH range of approximately 7.35 to 7.45.

3. **Identify the pH in Veins**:
- Venous blood, which is deoxygenated and carries more carbon dioxide (CO2) and waste products, has a pH range of about 7.31 to 7.41.

4. **Analyze the Impact of CO2 on pH**:
- The presence of higher levels of CO2 in venous blood leads to the formation of carbonic acid, which makes the blood more acidic. This results in a lower pH compared to arterial blood.

5. **Compare the pH Levels**:
- Since arterial blood has a higher pH (less acidic) compared to venous blood (more acidic), we can conclude that the pH of blood in arteries is higher than that in veins.

6. **Select the Correct Option**:
- Based on the analysis, the correct answer is that the pH of blood is more in arteries and less in veins.

### Final Answer:
- The pH of blood in arteries is higher than in veins.