Dialysing unit (artificial kidney) contains a fluid which is almost same as plasma except that it has

Options

A. high glucose
B. high urea
C. no urea
D. high uric acid

Explanation

To solve the question regarding the composition of the fluid in a dialysing unit (artificial kidney), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Purpose of Dialysis**: The dialysing unit, or artificial kidney, is designed to remove waste products from the blood when the kidneys are not functioning properly. It uses a semi-permeable membrane to allow certain substances to pass while retaining others.

2. **Identify the Composition of Dialysing Fluid**: The fluid used in the dialysing unit is similar to plasma but is specifically adjusted to facilitate the removal of waste products from the blood.

3. **Recognize Key Differences**: The dialysing fluid is formulated to have lower concentrations of certain waste products that are typically elevated in uremic blood, such as urea, creatinine, uric acid, and phosphates.

4. **Analyze the Options Provided**: The question provides four options:
- High glucose
- High urea
- No urea
- High uric acid

5. **Determine the Correct Option**: Since the dialysing fluid is specifically designed to remove waste products, it does not contain urea. Therefore, the correct answer is "no urea."

### Final Answer:
The fluid in the dialysing unit (artificial kidney) has **no urea**.