At rest, the cytoplasmic Ca2+ concentration in a typical skeletal muscle cell is about 70 nM. At the peak of the skeletal muscle cell contraction phase, the cytoplasmic Ca2+ concentration is approximately:

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Physiology Test Question

At rest, the cytoplasmic Ca²⁺ concentration in a typical skeletal muscle cell is about 70 nM. At the peak of the skeletal muscle cell contraction phase, the cytoplasmic Ca²⁺ concentration is approximately:

	(A) 10⁻¹ M
	(B) 10⁻³ M
	(C) 10⁻⁶ M
	(D) 10⁻⁹ M
	(E) 10⁻¹² M

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Posted: Monday, September 8, 2014