experiments performed on smooth muscle strips of guinea-pig taenia coli in high-potassium solution using sucrose-gap method revealed that phasic and tonic components of contractile response following potassium depolarization were due to influx into the cells of ca++ ions from extracellular solution through two types of voltage-dependent ca channels : the fast inactivated and the slow noninactivated those .
C0600508
components
C0007634
cells