Which statement is incorrect? A) PTH (parathyroid hormone) causes an increase in plasma calcium by activation of osteoclasts. B) PTH increases renal reabsorption of calcium. C) Vitamin D causes an increase in secretion of Ca²⁺ into the lumen of the digestive tract. D) Calcitonin causes a decrease in plasma calcium by decreasing Ca²⁺ movement from the bone fluid into the plasma and by suppressing bone resorption. E) When plasma calcium increases, PTH decreases and calcitonin increases.

Question

Quizplus · Accepted Answer

Vitamin D actually increases the absorption of calcium from the digestive tract into the bloodstream, not secretion into the lumen.

Which Statement Is Incorrect