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Question: over 98 of the total potassium in the body is...

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Over 98% of the total potassium in the body is contained inside cells; only a relatively small amount is contained in the extracellular fluid. After a normal meal, increased extracellular potassium levels trigger increased uptake of potassium into cells and increased excretion of potassium by the kidneys. These mechanisms rapidly remove the excess potassium from the extracellular fluid, preventing potentially lethal hyperkalemia. (a) What type of feedback loop is this? (b) Sketch a graph of extracellular fluid potassium concentration vs. time after a normal meal, using the format below. Assume the initial concentration (before the meal) is at the set point.Normal Set point range Time

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