sp ( 10 ( -10 ) -10 ( -9 ) m ) , however , did not change the amplitude of inhibitory junction potentials ( i.j.ps ) recorded from the circular muscle cells.9 these results indicate that sp in relatively low concentrations acts on both smooth muscle cells and on excitatory neuro-effector transmission in the longitudinal muscle ;
C1135918
smooth muscle cells
C0026845
muscle