Parathyroid hormone (PTH) has several actions in the body, including:
Increasing calcium levels in the blood by stimulating the release of calcium from bone and decreasing calcium excretion in the kidneys
Stimulating the production of active vitamin D in the kidney, which helps increase calcium absorption in the intestines
Inhibiting the reabsorption of phosphate in the kidneys, leading to increased phosphate excretion
Stimulating osteoclast activity, which breaks down bone and releases calcium into the blood
Inhibiting osteoblast activity, which decreases bone formation
Overall, PTH plays a critical role in regulating calcium and phosphate levels in the body to maintain proper bone health and mineral balance.
