Reabsorption of chloride ions `(CI^(-))` from glomerular filtrate in PCT of nephron of mammal is carried out by

Options

A. Osmosis
B. Diffusion
C. Active transport
D. Passive transport

Answer

To solve the question regarding the reabsorption of chloride ions `(Cl^(-))` from glomerular filtrate in the Proximal Convoluted Tubule (PCT) of the nephron in mammals, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure**: The Proximal Convoluted Tubule (PCT) is the first segment of the nephron, where significant reabsorption of solutes occurs.

2. **Identifying the Process**: The reabsorption of chloride ions occurs in the PCT. This process is part of the overall function of the nephron to reclaim essential substances from the filtrate back into the bloodstream.

3. **Types of Transport Mechanisms**: There are two main types of transport mechanisms involved in the reabsorption of substances:
- **Passive Transport**: This does not require energy (ATP) and occurs down the concentration gradient.
- **Active Transport**: This requires energy (ATP) to move substances against their concentration gradient.

4. **Reabsorption of Chloride Ions**: Chloride ions are reabsorbed primarily through passive transport mechanisms in the PCT. This means that chloride ions move from the tubular fluid into the blood without the direct use of ATP.

5. **Conclusion**: The reabsorption of chloride ions `(Cl^(-))` from glomerular filtrate in the PCT of the nephron is carried out by passive transport mechanisms.

### Final Answer:
The reabsorption of chloride ions `(Cl^(-))` from glomerular filtrate in the Proximal Convoluted Tubule (PCT) of the nephron of mammals is carried out by **passive transport**.

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