Muscle contraction?

I am wondering if calcium ions are stored in the transerse tubule during muscle contraction? Thank You.
If not where on earth are they stored? The sacroplasmic reticulum?Muscle contraction?
Calcium ions are indeed stored in the sarcoplasmic reticulum contained by muscle cells. Good errand.
wuh?
what are you talking going on for? what is the sacroplasmic reticulum?? I think you should ask your doctor. Sorry..
I conjecture people who havent taken anatomy/physiology should stop answering anatomy/physiology ?s ....anyway the creature of above me is right after the calcium has bound beside the troponin the excess is pumped back into the sarcoplasmic reticulum via Ca atpase pumps.
At the exit of each transverse tubule onto the muscle fiber surface, the conduct potential spreads inside the muscle fiber.
At each point where on earth a transverse tubule touches part of the sarcoplasmic reticulum, it cause the sarcoplasmic reticulum to release Ca++ ions.
The calcium ions result in movement of troponin and tropomyosin on their bare filaments, and this enable the myosin molecule heads to "clutch and swivel" their way along the tough filament. This is the driving force of muscle contraction.
The answer is sarcoplasmic reticulum.