Signal-Response Pathway

Definition

A signal-response pathway involves a series of molecular changes that convert a signal on a target cell's surface to specific responses inside the cell.

Related terms

Receptor Protein:

These proteins bind to specific signaling molecules, triggering changes within the cell.

Second Messenger System: This system relays signals received at receptors on the cell surface — such as arrival of protein hormones, growth factors etc.—to target molecules inside cytoplasm or nucleus.

Transduction Pathway:

A sequence of reactions within a cell that leads to response after activation by receptor.