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Signal Specificity

Meaning

Signal specificity refers to the precise and selective nature of cellular communication, which ensures that a particular hormone, growth factor, or neurotransmitter elicits a physiological response only in its intended target cells. This essential precision is achieved through the unique and restricted expression of high-affinity receptors and the subsequent organized arrangement of intracellular signaling pathways. High signal specificity is absolutely essential for the coordinated, error-free function of the endocrine, nervous, and immune systems.