Calicitonin causes hypocalcemia by
Refer KDT 6/e p 330 Calcitonin inhibits bone resorption by direct action on osteoclasts Calcitonin recetpors are present on osteoclasts It also inhibits proximal tubular calcium and and phosphate reabsorption by direct action on kidney However hypocalcemia which occurs overrides the direct action by decreasing the total Ca2+ filtered at the Glomerulus
Inhibiting bone resorption
Promoting osteolysis
Decreasing renal tubular reabsorption of calcium
Decreasing absorption of phosphorus
Endocrinology