K+ (potassium ions)

Potassium ions (K⁺) are positively charged particles essential for maintaining proper cell function, especially in nerves and muscles. They help regulate the electrical signals that enable heartbeats, muscle contractions, and nerve communication. Inside cells, potassium is abundant, creating a difference in electrical charge across the cell membrane, known as the resting potential. This difference allows cells to quickly transmit signals when needed. Balanced levels of potassium are vital; too much or too little can disrupt these processes, affecting health and bodily functions.