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Question: you are working to design an optimum cellular system to...

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You are working to design an optimum cellular system to rapidly screen the effects of drugs on neural firing. You have both yeast and bacterial model cells. The extracellular concentration is 4 mM Potassium and 100 mM Sodium. The yeast (Saccharomyces cerevisiae) has an internal concentration of 300 mM Potassium and 20 mM Sodium, while the bacteria (Escherichia coli) has an internal concentration of 55 mM Potassium 10 mM Sodium. Which system would better represent the internal milieu of neurons? Briefly explain why.

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