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The concentration of Calcium in a resting cell is ___________(a) 10 M(b) 10^-2 M(c) 10^-5 M(d) 10^-7 MI got this question in homework.My question is taken from Cell Signaling and Signal Transduction topic in section Cell Signaling and Signal Transduction of Cell Biology

Answer» RIGHT choice is (d) 10^-7 M

To explain I would say: The concentration of Calcium IONS in a resting CELL is usually MAINTAINED at very low levels, approximately 10^-7 M. However, outside the CELLS (extracellular space) in the ER lumen or a plant cell vacuole, the concentration is much higher.


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