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Mechanism of hormone action

On the target cell, the hormone receptor complex act by any of the following mechanisms:

  1. By altering the permeability of the cell membrane. ( Neurohormones)
  2. By activating the intracellular enzymes and second messengers like cAMP.( Protein Hormones)
  3. By activating the gene.(Thyroid and steroid Hormones)
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