Question

Name the two hormones that regulates blood calcium levels in the body
(A)Insulin and glucagon
(B)Thyroxine and estrogen
(C)Thyrocalcitonin and parathyroid hormone
(D)Prolactin and oxytocin

Answer 1

Hint: Calcium metabolism is defined as the process which involves the movement and regulation of calcium ions. This movement of calcium ion enters into the body by gut and out from the body by kidney as well inside the body like in blood plasma, extracellular and intracellular fluids and bones.

Complete answer:
1.Bones are the primary storage area for calcium and they release calcium into blood through the bone remodeling.
2.Calcium is present in the high amount in the human body. Adult body has a 99% skeleton formed from the calcium phosphate salts and extracellular contains out of which is present in the plasma and is exchanged in the bones.
3.There are two main hormones responsible for maintaining the calcium level: Thyrocalcitonin and parathyroid hormones.
4.TCT is released when calcium level in blood is high and it decreases the levels by stopping the release of calcium ions from bones.
5.Parathyroid hormone increases the blood calcium level by increasing calcium absorption from intestine and by bone remodeling takes the calcium from bones to blood.

Hence the correct answer is option(C)

Note: There are several roles in the body which are played by calcium like: Helps in blood clotting, voltage gated channels are sensitive to calcium, Intracellular signaling, act as the supporting material in the bones and helps in the contraction of skeletal and heart muscle.