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Second Messenger Systems Activation

Meaning

Second Messenger Systems Activation is the rapid, intracellular cascade of molecular events triggered when a hormone or neurotransmitter binds to a specific receptor on the outer cell membrane. These crucial systems, such as cyclic AMP (cAMP) or calcium ions, translate the external signal into a specific, amplified internal cellular response. This mechanism is characteristic of peptide hormones and catecholamines, mediating fast, short-term physiological effects that regulate immediate cellular function.