`Na^(+)`/`K^(+)` pump in a cell is an example of

Options

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

Answer

To determine what type of transport the Na⁺/K⁺ pump in a cell is an example of, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Function of the Na⁺/K⁺ Pump**:
- The Na⁺/K⁺ pump is a membrane protein that actively transports sodium (Na⁺) and potassium (K⁺) ions across the cell membrane. It moves 3 sodium ions out of the cell and 2 potassium ions into the cell.

2. **Energy Requirement**:
- This transport process requires energy because it moves ions against their concentration gradients. Sodium ions are moved from an area of lower concentration (inside the cell) to an area of higher concentration (outside the cell), and potassium ions are moved from an area of lower concentration (outside the cell) to an area of higher concentration (inside the cell).

3. **Source of Energy**:
- The energy for the Na⁺/K⁺ pump comes from ATP (adenosine triphosphate). The hydrolysis of ATP provides the necessary energy to carry out this active transport.

4. **Classification of Transport**:
- Since the Na⁺/K⁺ pump requires energy to function and moves ions against their concentration gradients, it is classified as an active transport mechanism.

5. **Conclusion**:
- Therefore, the Na⁺/K⁺ pump in a cell is an example of **active transport**.

### Final Answer:
The Na⁺/K⁺ pump in a cell is an example of **active transport**.

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