Question

Select the ion(s) that is/are found in high concentrations inside normal nerve cells.

1) Na⁺
2) K⁺
3) two of these
4) Ca₂⁺

Answer 1

Potassium ions (K+) are found in high concentrations inside normal nerve cells, playing a key role in nerve signal transmission and cell function.

Step-by-step explanation:

The ion(s) that are found in high concentrations inside normal nerve cells are K+ (potassium ions). While Na+ (sodium ions) and Ca2+ (calcium ions) are primarily found outside of cells, it is potassium ions that are notably concentrated within the cell's interior. Potassium plays a crucial role in maintaining the cell's electrical conductivity, which is essential for nerve signal transmission. The balance between these ions is regulated by mechanisms such as the sodium-potassium pump, which actively exchanges Na+ and K+ to maintain the correct concentrations inside and outside the cell.