hey troponin if you ever tear a tricep just be glad you didnt explode youre heart. they are both muscles . so have at it , you are a waste of human life if you continue this
I'll bite one last time, okay?
One is striated muscle, one is cardiac muscle.
One is controlled by the autonomic nervous system (and subsequent sympathetic and parasympathetic responses), one is controled by the somatic nervous system (which is controlled by the penis in men).
As for a muscular contraction:
When the muscle cell is stimulated to contract, mechanisms cause the concentration of calcium in the sarcoplasm to rise. Some of this calcium attaches to
troponin, causing a conformational change that moves
troponin and tropomyosin out of the way so that the cross bridges can attach to actin and produce muscle contraction. Without
troponin, there can be no muscular contraction.