PPT Slide
Parathyroid Hormone [PTH] is released when blood calcium levels are low
Causes: activation of Vitamin D: enhanced absorption of calcium from digestive tract, decreased excretion of calcium via kidneys. Osteoclasts increase activity
Calcitonin is released when blood calcium levels are too high
Causes: enhanced excretion of calcium via kidneys, decreased absorption of calcium in digestive tract. Slows osteoclastic activity – enhances osteoblastic activity