Question: Why do you suppose cells use Ca 2+ (which is kept by Ca 2+ pumps at a cytosolic concentration of 10 7 M) for intracellular

Why do you suppose cells use Ca²⁺ (which is kept by Ca²⁺ pumps at a cytosolic concentration of 10^–7 M) for intracellular signaling and not another ion such as Na⁺ (which is kept by the Na⁺ pump at a cytosolic concentration of 10^–3M)?

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For numerous reasons Ca2 ions are preferred above other ions like Na by cells for intracellular signaling Ca2 pumps at the plasma membrane and intrace... View full answer

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