Question

Parathyroid hormone modifies plasma Ca++ by affecting bone formation/resorption, renal Ca++ excretion/resorption, calcitriol synthesis (Vit D) --> having an indirect impact on

Answer 1

Parathyroid hormone (PTH) affects bone formation, renal calcium excretion, and calcitriol synthesis, indirectly impacting plasma calcium levels.

Step-by-step explanation:

Parathyroid hormone (PTH) is a hormone produced by the parathyroid glands that plays a crucial role in regulating plasma calcium levels. PTH affects bone formation and resorption, renal calcium excretion and resorption, as well as calcitriol synthesis. By stimulating osteoclast activity, PTH promotes the release of calcium from the bones into the blood. PTH also increases renal calcium reabsorption and indirectly enhances calcium uptake in the small intestine through the synthesis of vitamin D. Overall, PTH has an indirect impact on plasma calcium levels by modulating these processes.