mechanisms other than blockade of influx of calcium from the extracellular medium have been suggested to explain these differences , including inhibition of intracellular calcium release , blockade of postjunctional alpha-adrenoceptors , interaction with calmodulin , inhibition of cyclic amp phosphodiesterase , stimulation of na+- , k+-activated atpase , stimulation of a calcium pump , and a direct interaction with the contractile proteins .
C0001473
atpase
C0001476
calcium pump