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Short-Acting Messenger Molecules

Meaning

Short-Acting Messenger Molecules are endogenous signaling compounds, such as certain peptides, neurotransmitters, or hormones, characterized by a rapid onset of action and a brief half-life in the systemic circulation or synaptic cleft. These molecules are essential for mediating acute, transient physiological responses, such as the pulsatile release of certain pituitary hormones or the rapid transmission of neural signals. Their brief duration allows for precise, moment-to-moment control and rapid system reset.