`NA^(+)-K^(+)` exchange pump involves

Options

A. Diffusion
B. Osmosis
C. Deplasmolysis
D. Acitve transport

Answer

### Step-by-Step Solution:

1. **Understanding the Sodium-Potassium Pump**: The Sodium-Potassium pump is a type of active transport mechanism found in the plasma membrane of cells. It is responsible for moving sodium (Na⁺) and potassium (K⁺) ions across the cell membrane.

2. **Direction of Ion Movement**: In this pump, sodium ions are transported out of the cell, while potassium ions are transported into the cell. Specifically, for every cycle of the pump, 3 sodium ions are moved out and 2 potassium ions are moved in.

3. **Against Concentration Gradient**: The movement of these ions is against their respective concentration gradients. This means that sodium ions are moving from an area of lower concentration inside the cell to an area of higher concentration outside the cell, and potassium ions are moving from an area of lower concentration outside the cell to an area of higher concentration inside the cell.

4. **Energy Requirement**: Since the movement of ions is against their concentration gradients, it requires energy. This energy is derived from ATP (adenosine triphosphate). The process of using energy to move ions against their gradient is known as active transport.

5. **Conclusion**: Therefore, the Sodium-Potassium exchange pump involves active transport, as it requires energy to move ions against their concentration gradients.

### Final Answer:
The Sodium-Potassium exchange pump involves **Active Transport**.

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