Paracrine Signaling
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
Paracrine signaling releases a ligand that diffuses to nearby cells, producing a fast, short-lived, locally concentrated response before enzymes degrade it.
Show
A wound's nearby cells release paracrine growth factors that trigger local tissue repair without entering the bloodstream.
Watch for
A paracrine signal's short range comes from rapid degradation, not from a weak or slow-acting ligand.