Question

which sturuction is the site of activity of path to increase the reasotption of calcium ions

Answer 1

Parathyroid gland is the important site of secretion of PTH; which stimulates calcium absorption.Parathyroid hormone (PTH) causes the reabsorption of calcium ions present in the bloodstream to regulate the ion concentration in the desired level i.e. The calcium haemostasis.The maintenance of optimum level of calcium ions are important for the proper functioning of the body.The normal blood calcium level is 8-10 mg/dL.The cells in parathyroid glands have specialized cells which detects the calcium ion levels in the blood and extracellular fluid.When the calcium level gets low, these cells relase PTH, which travels through blood targeting the various tissues in the body.

Bones: The osteoblasts will become less active and osteoclasts will be more active to release calcium from the bones into the blood.This will increase the level of calcium.

Kidneys: The kidney cells reabsorb the calcium.PTH tells those cells to keep the calcium that filtred adding back into the bloodstream and make the level high.In such situations,the excretion of calcium through the kidneys will be reduced.

Intestine:Since the cells in the intestine absorb calcium during the absorptive process of digestion, they act as a potential source of calcium ions to be released into the bloodsrream in required sessions.The calcium that are absorbed by these cells will be realeeds back to the blood by the action of PTH.It reqiures vitamin D for the absorption of the calcium into the body.