Question

Which of the following hormone increases the calcium level of blood?

• A. Parathyroid hormone
• B. Noradrenaline
• C. Corticosteroids
• D. Aldosterone

Answer 1

Answer: (A)

The parathyroid glands produce parathyroid hormone. This hormone helps maintain an appropriate balance of calcium in the bloodstream.
Functions of Parathyroid hormone (PTH):
$1.$ PTH increases the process of bone resorption or dissolution (demineralisation) of bone.
$2.$ PTH stimulates the reabsorption of $C{a}^{2+}$ by the renal tubules.
$3.$ PTH increases absorption of $C{a}^{2+}$ from the digested food.
$4.$ All above actions of PTH increases the blood $C{a}^{2+}$ levels, thus PTH is a hypercalcemic hormone. PTH and TCT plays a significant role in maintaining the calcium balance in the body.