Hitting the Gym But Not Growing? The 'Secret Switch' Your Muscles Are Missing. Androgen receptor density plays a meaningful role in muscle anabolism because it determines how strongly a muscle fiber responds to androgen signaling. Gabriel Alizaidy, MD, MS The carnitine system and cancer metabolic plasticity Cell Death & Disease Architecture of androgen receptor pathways amplifying glucagon like peptide 1 insulinotropic action in male pancreatic cells ScienceDirect