What is the function of calcium in cardiac action potentials

Question

anonymous · Answer

calcium binds to filaments in the musles saromeres and allows them to contract, more calcium= more contraction

anonymous · Answer

The calcium goes attached to the actin filaments opening up the myosin bonding sites. This allows for the myosin heads on the thick filament to attach to the thin filaments and made them slide past each other. This is what causes the contraction.

anonymous · Answer

In addition to its role in contraction, calcium influx, chloride influx and potassium efflux are responsible for the "plateau" phase of the cardiac action potential.