A scaletal muscle is conscious contraction to any time you voluntarily move thing. cardio mi catic heart muscle cells are different in n again les or muscle cells, or contract with the purpose of something to move. You can have a single neuron sinapsing with a single muscle cell, and that can cause the whole heart to contract. And then if you have a stone in it, yes, it contracts around that, and it's, and that's not soundng, the most painful painthat you'll get.