Question

Parathormone is necessary to maintain life.

• A. True
• B. False

Answer 1

The correct option is A True

Calcium is the most abundant mineral in the body. Almost all of the calcium in the body is found in the skeleton - more than 98% in fact. Calcium is also important in the building and maintenance of teeth and it plays a key role in our cells. In our cells, it is involved in many processes, such as in the contraction of our muscles and in the transmission of signals in nerves.

Parathormone has multiple actions, all of which result in an increase in serum calcium concentration. For example, it activates large bone-dissolving cells called osteoclasts that mobilize calcium from bone tissue, and it stimulates the kidney tubules to reabsorb calcium from the urine. Parathormone also stimulates the kidney tubules to produce calcitriol (1,25-dihydroxyvitamin D), the most active form of vitamin D, from calcidiol (25-hydroxyvitamin D), a less active form of vitamin D. Hence, parathormone is necessary to maintain life.