What is It About a Cell That Identifies It as a Target

Question

What is it about a cell that identifies it as a target cell for a hormone?
A) the presence of a receptor specific for that hormone
B) its location near the gland that secretes that hormone
C) the ability of the target cell to perform a specific function
D) its ability to inactivate the hormone
E) the size of the target cell

Accepted Answer

The presence of a receptor specific for that hormone is what identifies a cell as a target cell for a hormone. Receptors are proteins located on the surface or inside the cell that recognize and bind to a specific hormone, triggering a signaling pathway within the cell. Without the presence of the specific receptor, the hormone will not be able to bind to the target cell and initiate the desired physiological response.