MICROANATOMY

Detailed explanation-1: -Mechanism of Hormone The specific cells that respond to a given hormone have receptor sites for that hormone. This is sort of a lock-and-key mechanism. If the key fits the lock, then the door will open. If a hormone fits the receptor site, then there will be an effect.

Detailed explanation-2: -A target cell is the type of cell on which a hormone has an effect. A target cell is affected by a particular hormone be ca use it has receptor proteins that are specific to that hormone. A hormone travels through the bloodstream until it finds a target cell with a matching receptor it can bind to.

Detailed explanation-3: -Much like a lock and key, many hormones act by binding to receptors that are produced within cells. When a hormone binds to a receptor, the receptor carries out the hormone’s instructions, either by altering the cell’s existing proteins or turning on genes that will build a new protein.