Anatomy & Physiology: Current Research
Open Access

Abstract

The Role of Calcium Signaling in Human Physiological Processes

Tereza Dvořáková

Calcium ions (Ca²?) are among the most versatile and essential intracellular signaling molecules in human physiology. Beyond their well established role in bone mineralization, calcium ions regulate an extraordinary range of biological processes, including muscle contraction, neuronal communication, hormone secretion, immune responses, gene expression and cellular metabolism. The ability of calcium to function as a universal second messenger has positioned calcium signaling at the center of physiological regulation across virtually every organ system. Recent advances in molecular biology, imaging technologies, and systems physiology have significantly expanded our understanding of calcium dynamics, revealing increasingly complex signaling networks that maintain human health and contribute to disease development. One of the defining characteristics of calcium signaling is its remarkable precision. Under resting conditions, intracellular calcium concentrations remain extremely low compared with extracellular levels. This steep concentration gradient enables cells to generate rapid and highly localized calcium signals in response to physiological stimuli.

Published Date: 2025-04-02; Received Date: 2025-03-03