when enough saline was infused into the urinary bladder to induce the voiding contraction in urethra-ligated rats , terodiline ( 1-10 mg/kg , i.v . ) and verapamil ( 1 mg/kg , i.v . ) abolished the contraction , of which amplitude and frequency were partially inhibited by atropine ( 1 mg/kg , i.v . ) .
C0005682
urinary bladder
C0042034
voiding