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WordNet-Online
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Definitions from the WebSecond MessengerDefinition: In cellular signaling, a second messenger refers to a molecule that acts as a messenger within the cell to relay signals from receptors on the cell membrane to target molecules or organelles. Example sentence 1 (noun): Cyclic AMP (cAMP) is a well-known second messenger involved in various cellular processes such as hormone regulation. Example sentence 2 (noun): Calcium ions act as second messengers in neuronal signaling, triggering the release of neurotransmitters. Example sentence 3 (noun): The activation of protein kinase C (PKC) by diacylglycerol (DAG) serves as a common second messenger pathway in many cellular processes. Example sentence 4 (noun): The production of inositol trisphosphate (IP3) as a second messenger is key in the regulation of calcium release from the endoplasmic reticulum. Example sentence 5 (adjective): The second messenger system is a crucial component in relaying extracellular signals to intracellular targets. Related products: | ||||
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