Which statement describes a role of the Na-K pump in the body?

The statement that the Na-K pump corrects for leak channels in the cell membrane accurately describes one of its essential roles in cellular physiology. The sodium-potassium pump (Na+/K+ ATPase) actively transports sodium ions out of the cell and potassium ions into the cell, maintaining the necessary concentration gradients for these ions.

In the context of leak channels, which are pathways that allow ions to passively diffuse across the membrane, there can be a tendency for sodium ions to enter the cell while potassium ions are lost. Without the action of the Na-K pump, these leak channels could cause an imbalance, leading to depolarization and potential cellular dysfunction. Therefore, the pump's activity is critical in countering this effect, ensuring that the intracellular concentration of potassium remains high while sodium concentration is kept low, allowing for proper excitability and signaling in cells, such as neurons and muscle cells.

This balancing act is foundational for various physiological processes, including the generation of action potentials, muscle contraction, and nerve impulse transmission. By maintaining these gradients, the Na-K pump plays a vital role in overall cellular homeostasis and function.