Which three cations are major in the human body?

The three major cations in the human body are sodium, potassium, and calcium, which play crucial roles in various physiological functions.

Sodium is essential for maintaining fluid balance, transmitting nerve impulses, and aiding muscle contraction. It is the primary cation in extracellular fluid and contributes to the osmotic gradient that influences water movement in and out of cells.

Potassium, on the other hand, is the major intracellular cation and is vital for maintaining cell membrane potential, regulating heartbeat, and facilitating muscle function, including the contraction of both skeletal and smooth muscles.

Calcium is most known for its role in bone structure and health, but it also plays a crucial part in neurotransmission, muscle contraction, and blood coagulation.

These three cations are critical to our overall health, as imbalances can lead to significant health issues, such as hypertension, cardiac arrhythmias, and muscle weakness. Each of these cations interacts with various biological processes, emphasizing their importance in the human body.