Biology / Unit 4 Bio 0765 short lesson, about 20 seconds
Paracrine Signaling
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The idea
Paracrine signaling releases a ligand that diffuses to nearby cells, producing a fast, short-lived, locally concentrated response before enzymes degrade it.
In practice
A wound's nearby cells release paracrine growth factors that trigger local tissue repair without entering the bloodstream.
Where people slip
A paracrine signal's short range comes from rapid degradation, not from a weak or slow-acting ligand.
Your place on the trail
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Builds on
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