PATHOLOGY

Detailed explanation-1: -Instead, a non-steroid hormone binds to a receptor on th e cell membr ane (see Figure below). The binding of the hormone triggers an enzyme inside the cell membrane. The enzyme activates another molecule, called the second messenger, which influences processes inside the cell.

Detailed explanation-2: -Answer and Explanation: The second messenger mechanism of hormone action operates by (a) binding to the extracellular receptors, which subsequently activate G proteins and cAMP. This occurs when water-soluble hormones (peptide hormones, for example) bind to extracellular receptors on the target cell.