The most important factor in decreasing the intracellular concentration of calcium ion after contraction is
a) diffusion of calcium out of the cell.
b) active transport of calcium into the sarcoplasmic reticulum.
c) active transport of calcium across the sarcolemma.
d) active transport of calcium into the synaptic cleft.
e) diffusion of calcium into the sarcoplasmic reticulum.
Answer: B