The accuracy and reliability with which hormonal and neural messages are transmitted from their source to the target cell receptor without distortion, attenuation, or interference from extraneous noise. High fidelity ensures that the physiological response precisely matches the required homeostatic demand, which is foundational to hormonal milieu stabilization. Low fidelity manifests as resistance or inappropriate sensitivity.
Origin
This term merges information theory concepts with endocrinology, viewing hormone signaling as a communication channel that can suffer from degradation. Fidelity emphasizes the quality of the message transfer, distinct from the mere quantity of the circulating hormone. It is crucial for complex regulatory loops.
Mechanism
Fidelity is maintained when receptor structure is sound, intracellular second messenger systems are unimpaired, and the concentration of competing or degrading molecules is controlled. For instance, reducing chronic inflammation (hs-CRP) protects receptor sites from inflammatory crosstalk that otherwise degrades the signal quality. This precision supports the anabolic drive and overall systemic vitality.
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