Medical Definition of Signal transduction

Signal transduction: A basic process in molecular cell biology involving the conversion of a signal from outside the cell to a functional change within the cell.

A signal (such as a hormone or neurotransmitter) interacts with a receptor on the cell surface; this interaction causes a change in a second messenger (such calcium); and, eventually, a change is triggered in the cell's function (for example, the cell divides).

Subscribe to MedicineNet's General Health Newsletter

By clicking Submit, I agree to the MedicineNet's Terms & Conditions & Privacy Policy and understand that I may opt out of MedicineNet's subscriptions at any time.

Last Editorial Review: 1/25/2017

Health Solutions From Our Sponsors