[Effect of strontium, barium and manganese ions on non-adrenergic inhibitory synaptic potentials and the action of ATP in the smooth muscle of the human intestine].

The ionic mechanism of nonadrenergic inhibition in smooth muscles of human intestine was studied by the sucrose-gap method. The results obtained suggest that calcium-dependent potassium conductance which consists of apamin-sensitive and -insensitive components is involved in the action of nonadrenergic transmitter in smooth muscles of human intestine.