Term Name:	activin receptor antagonist activity
Synonyms:
Definition:	Interacting with an activin receptor complex to reduce the action of another ligand, the agonist. A receptor antagonist does not initiate signaling upon binding to a receptor, but instead blocks an agonist from binding to the receptor.
Ontology:	GO: Molecular Function [GO:0038102]    QuickGO    AmiGO