( iii ) slow waves with no change in the membrane potential.4 in the circular muscle cells , low concentrations of sp ( < 10 ( -8 ) m ) did not affect the membrane potential or the spikes , but sp ( 10 ( -7 ) m ) increased the spike discharges with no significant change in the membrane potential.5 sp ( 10 ( -10 ) m ) reduced the threshold depolarization required for the generation of action potentials with no change in membrane potential of the longitudinal muscle cells.6 pretreatment with atropine ( 5 x 10 ( -6 ) m ) , tetrodotoxin ( ttx 10 ( -6 ) m ) or baclofen ( 4.7 x 10 ( -6 ) m ) had no effect on the excitatory actions of sp on the smooth muscle cells of longitudinal and circular muscle strips.7 excitatory actions of sp on the membrane potential or spike activities of longitudinal muscle cells were preserved in nacl but not in ca-deficient solution.8 sp ( 10 ( -10 ) -10 ( -9 ) m ) enhanced the amplitude of the excitatory junction potentials ( e.j.ps ) evoked by electrical field stimulation in longitudinal muscle cells with no change in the membrane potential and input resistance .
C0026845
muscle
C0596981
muscle cells