What is the primary role of the Na+/K+ pump?

• A. To produce ATP in cells
• B. To create concentration gradients and generate heat
• C. To facilitate cell communication
• D. To assist in protein synthesis

Answer: (B)

The primary role of the Na+/K+ pump is to create concentration gradients for sodium (Na+) and potassium (K+) ions across the cell membrane. This pump actively transports three sodium ions out of the cell and two potassium ions into the cell against their respective concentration gradients, which is essential for maintaining the resting membrane potential of cells and ensuring proper cellular function.

By creating these gradients, the Na+/K+ pump plays a crucial role in various physiological processes, including nerve impulse transmission and muscle contraction. Additionally, the movement of ions and the associated energy expenditure contribute to generating heat, especially in active tissues. Understanding the significance of this pump in establishing ion concentrations helps clarify its essential role in cellular homeostasis and function.

The other options, such as producing ATP, facilitating cell communication, and assisting in protein synthesis, are not directly related to the Na+/K+ pump's primary function. Each of these processes involves different cellular mechanisms and components, highlighting the specific and critical nature of the Na+/K+ pump in maintaining the electrochemical balance within cells.