Normally, what is the relationship of the amount of sodium excreted to the amount ingested that day? a. at extremes of intake, they are unrelated; at normal intake, intake is greater than excretion. b. intake is higher. c. excretion is higher. d. excretion is unrelated to intake. e. intake and excretion are equal.

The correct answer is "intake and excretion are equal." Normally, there should be equilibrium between the intake of sodium and the excreted sodium. There are regulatory mechanisms in the body that regulate the excretion of sodium in order to match it with the intake. This is to prevent hyponatremia and hypernatremia.

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