how much electrolytes and water are absorbed by PCT of nephron?

Answer

To answer the question regarding how much electrolytes and water are absorbed by the Proximal Convoluted Tubule (PCT) of the nephron, we can break down the information into clear steps:

### Step-by-Step Solution:

1. **Understanding the Nephron Structure**:
- The nephron is the functional unit of the kidney, consisting of approximately 1 million nephrons in each kidney. Each nephron has two main parts: the glomerulus (a tuft of capillaries) and the renal tubule.

2. **Identifying the Parts of the Renal Tubule**:
- The renal tubule is divided into several sections, with the first part being the Bowman's capsule, which houses the glomerulus. The next part is the Proximal Convoluted Tubule (PCT).

3. **Function of the PCT**:
- The PCT is responsible for the reabsorption of essential substances from the filtrate produced in the glomerulus. This includes electrolytes (such as sodium, potassium, and chloride) and water.

4. **Quantifying Absorption**:
- It is noted that the PCT absorbs approximately 70 to 80% of the electrolytes and water that pass through it. This significant absorption is crucial for maintaining the body’s pH and ionic balance.

5. **Conclusion**:
- Therefore, the answer to the question is that the PCT of the nephron absorbs about 70-80% of the electrolytes and water.

### Final Answer:
The Proximal Convoluted Tubule (PCT) of the nephron absorbs approximately 70-80% of the electrolytes and water.

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