Most of the reabsorption of filtered calcium is unregulated and occurs in the ________, but an additional amount can be reabsorbed in the ________, depending on the plasma concentration of parathyroid hormone.

A. proximal convoluted tubule; descending loop of Henle
B. distal convoluted tubule; medullary collecting ducts
C. distal convoluted tubule; renal corpuscle
D. distal convoluted tubule; proximal convoluted tubule
E. proximal convoluted tubule; distal convoluted tubule


Answer: E

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