Excitation-contraction coupling
A) In skeletal-muscle cells requires the influx of extracellular calcium ion
B) In smooth-muscle cells requires the influx of extracellular calcium ion
C) In all kinds of muscle requires the release of calcium ion from the sarcoplasmic reticulum
D) Both in skeletal-muscle cells requires the influx of extracellular calcium ion and in smooth-muscle cells requires the influx of extracellular calcium ion are correct
E) Both in smooth-muscle cells requires the influx of extracellular calcium ion and in all kinds of muscle requires the release of calcium ion from the sarcoplasmic reticulum are correct
Correct Answer:
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