regulation of biological quality
   |__regulation of membrane potential
       |__action potential  15 rec.
           |__action potential initiation
           |__action potential propagation
           |   |__neuronal action potential back-propagation
           |   |__neuronal action potential propagation
           |__cardiac muscle cell action potential
           |   |__AV node cell action potential(+)
           |   |__bundle of His cell action potential(+)
           |   |__cardiac muscle cell action potential involved in contraction(+)
           |   |__membrane depolarization during cardiac muscle cell action potential(+)
           |   |__membrane repolarization during cardiac muscle cell action potential(+)
           |   |__Purkinje myocyte action potential(+)
           |   |__regulation of cardiac muscle cell action potential(+)
           |   |__SA node cell action potential(+)
           |__membrane depolarization during action potential 3 rec.
           |   |__membrane depolarization during cardiac muscle cell action potential(+)
           |   |__regulation of membrane depolarization during action potential(+)
           |__membrane repolarization during action potential
           |   |__membrane repolarization during cardiac muscle cell action potential(+)
           |   |__regulation of membrane repolarization during action potential(+)
           |__neuronal action potential 7 rec.
           |   |__regulation of neuronal action potential(+) 5 rec.
           |__regulation of action potential 5 rec.
           |   |__negative regulation of action potential(+) 3 rec.
           |   |__positive regulation of action potential(+) 2 rec.
           |   |__regulation of action potential firing pattern
           |   |__regulation of action potential firing rate
           |   |__regulation of action potential firing threshold
           |   |__regulation of cardiac muscle cell action potential(+)
           |   |__regulation of membrane repolarization during action potential(+)
           |   |__regulation of neuronal action potential(+) 5 rec.
           |   |__regulation of skeletal muscle contraction via regulation of action potential
           |__regulation of skeletal muscle contraction by action potential
               |__regulation of skeletal muscle contraction via regulation of action potential