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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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