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Calcium Signaling

Meaning

Calcium Signaling is the highly sophisticated, dynamic process where the calcium ion, Ca²⁺, functions as a ubiquitous intracellular second messenger to translate extracellular stimuli into a wide array of specific cellular responses. This tightly controlled system is fundamental for governing numerous essential physiological processes, including muscle contraction, neurotransmitter release, hormone secretion, and gene expression. Precise regulation of calcium gradients is absolutely critical for maintaining cellular homeostasis and ensuring the proper functioning of the entire endocrine system.