Nonsteroidal hormones bind to receptors on the surface of the cell and activate a(n) ________ that causes enzymes inside the cell to be turned on.

Second Messenger

Intracellular signaling molecules released by the cell in response to exposure to extracellular signaling molecules.

Nonsteroidal Hormones

Hormones that are not derived from steroids, often consisting of proteins or peptides, and act through specific receptor interactions in target cells.