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Hormone Secretion Timing

Meaning

Hormone secretion timing refers to the precise, circadian-controlled release of endocrine signaling molecules into the bloodstream, a process that is often pulsatile and highly rhythmic. This temporal regulation ensures that hormones exert their effects on target tissues at the most physiologically relevant time of the 24-hour cycle. The correct timing is essential for maintaining hormonal sensitivity, as mistimed exposure can lead to receptor desensitization and ineffective signaling. Key hormones, including cortisol, melatonin, and growth hormone, exhibit characteristic and clinically important secretion rhythms.