Which electrolyte range is essential for the electrical activity of neurons and muscle cells?

The range for sodium, which is 136-142 mEq/L, is crucial for the electrical activity of neurons and muscle cells due to its role in generating and propagating action potentials. Neurons and muscle fibers rely on the movement of sodium ions across their membranes to initiate and transmit electrical signals. When sodium channels open in response to a stimulus, sodium ions flow into the cell, leading to depolarization of the membrane. This change in voltage triggers a cascade of events necessary for muscle contraction and nerve impulse transmission.

Maintaining sodium levels within this specific range is vital for proper cellular function. Levels outside this range can lead to issues such as muscle weakness, seizures, or other neurological disturbances. The correct balance of sodium is critical for the normal excitability of nerve and muscle tissues, facilitating communication and movement throughout the body.