Question

The hormone involved in maintaining calcium balance in the human body are-
a. MSH and ACTH
b. PTH and LTH
c. PTH and TCT
d. TCT and FSH

Answer 1

Hint: A hormone that the parafollicular cells (commonly known as C-cells) of the thyroid gland generate in humans. It helps to control calcium and phosphate levels in the blood and opposes the action of other related hormones.

Complete answer:
> Option A is incorrect. A group of hormones released by the pituitary gland, the hypothalamus and skin cells are identified by MSH. It is essential for the protection of the skin from UV rays, pigmentation development and appetite regulation. In order to release cortisol and androgens, ACTH acts on the adrenal cortex. To minimise the amount of CRH released from the hypothalamus, the rise in cortisol provides a negative feedback mechanism.

> Option B is incorrect. By releasing calcium from your bones and increasing the amount of calcium absorbed from your tiny intestine, PTH increases calcium levels. The parathyroid glands produce less PTH when blood-calcium levels are too high. But often too many hormones are released by one or more of these glands. Prolactin, also known as luteotropic hormone (LTH) or luteotropin, is a protein hormone released by the mammalian pituitary gland that works with other hormones to cause the mammalian glands to secrete milk.

> Option C is correct. There are two hormones found in calcium metabolism that are synthesised by the human body. Parathormone (PTH) is secreted by parathyroid gland cells that are involved in increasing blood calcium levels. The thyrocalcitonin (TCT) hormone secreted by the thyroid glands C-cells is crucial for increasing the cells' calcium uptake.

> Option D is incorrect. Thyrocalcitonin (TCT), a hormone polypeptide secreted by the mammalian thyroid glands "C" (parafollicular) cells. TCT and Parathyroid Hormone (PTH) together, the blood calcium level is preserved by rising within the normal range. In sexual growth and functioning, FSH plays an important part. FSH helps regulate the menstrual cycle in women and promotes egg development in the ovaries.

Hence, the correct answer is option (C).

Note: Parathyroid hormone leads to increased calcium levels in the blood, whereas calcitonin acts to reduce calcium levels in the blood. Calcium sensing receptors in the parathyroid gland are activated when blood calcium levels drop below a certain amount, and parathyroid hormone is released into the blood by the parathyroid glands.