Which of the following is/are true statements?
A. Calcium is reabsorbed in DCT
B. 90% calcium is excreted by glomerulus
C. Parathormone (PTH) promotes absorption of Ca from intestine
D. PTH promotes action of calcitonin
Ans. A. Calcium reabsorbed in DCT ; (C) Parathormone (PTH) promotes
absorption of
Ca from intestine :
• A large amount of calcium is filtered in the kidneys but 98-99% of filtered calcium is eabsorbed.
• Parathyroid hormone promotes absorption of calcium from intestine.
• Calcitonin is stimulated when there is hypercalcemia. Calcium level parallels the calcitonin level.
• Approximately 60% of calcium in ECF is ultrafiltrable and exists as free in solution ionized calcium or complexed with anions e.g. citrate, phosphate. Remaining 4 bind to albumin Manual of Nephrology).
• A large amount of calcium is filtered in the kidneys but 98-99% of filtered calcium is eabsorbed.
• Parathyroid hormone promotes absorption of calcium from intestine.
• Calcitonin is stimulated when there is hypercalcemia. Calcium level parallels the calcitonin level.
• Approximately 60% of calcium in ECF is ultrafiltrable and exists as free in solution ionized calcium or complexed with anions e.g. citrate, phosphate. Remaining 4 bind to albumin Manual of Nephrology).
