a 15-20-min treatment of the muscle with 2 x 10 ( -8 ) m tpa caused a progressing inhibition of spontaneous electrical activity and mechanical tension , suppression of post-hyperpolarizing electrical and contractile `` '' off-responses '' '' , a decrease in the number of action potentials during superthreshold membrane depolarization , depression of electrical and mechanical responses induced by acetylcholine , histamine , bradykinin mediators .
C0026820
contractile
C0006100
, bradykin