The role of calcitonin in regulating the concentration of calcium in extracellular fluid. Introduction: The regulation of the calcium levels depends on the balance between the absorption of calcium across the wall of the intestinal tract and excretion of calcium by the kidney. The parathyroid hormone and calcitonin help in creating that balance.

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Chapter 27.4, Problem 29AYP

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The role of calcitonin in regulating the concentration of calcium in extracellular fluid.

Introduction:

The regulation of the calcium levels depends on the balance between the absorption of calcium across the wall of the intestinal tract and excretion of calcium by the kidney. The parathyroid hormone and calcitonin help in creating that balance.

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can you help? I think its B but not sure