Question

Discuss how calcium homeostasis is maintained in the blood, especially the mechanism of positive regulation of calcium levels. What are the two hormones you learned in the class that control the levels of calcium? What classes of hormones are they? List all organs that participate in the processes and their roles. Do you think the administration of calcitonin would help improve the condition of osteoporosis? Briefly defend your argument.

Answer 1

Blood Calcium homeostasis is maintained mainly by 3 hormone that is the parathyroid hormone, calcitonin and calcitriol.

The PTH and calcitriol Increase the calcium in blood but calcitonin reduce serum calcium.

Positive regulation of Calcium is that when the parathyroid gland and kiney detect lack of calcium in blood it will result in the stimulation of the glands to secrete the parathyroid hormone and calcitriol into blood . The parathyroid hormone stimulate osteoclast and cause resorption of bones for Calcium and the calcitriol will cause absorption of calcium in intestine. This will cause maintain of normal Calcium level in blood

Question no 2

The main 2 hormone are calcitonin and parathyroid hormone

Question no 3

These belong to protein class of hormones and is endocrine.

Question no 4

The organ that participante in the process are parathyroid glands that secret parathyroid hormone and cause increase in Calcium

Kidney that secrete calcitriol and increase absorption if calcium from intestine

Thyroid gland stimulation cause calcitonin secretion and decrease level of calcium

Question no 5

Yes calcitonin will help in reduction of osteoporosis as when the amount or the mass and density of bones decrease it will result in osteoporosis. So when calcitonin is give it will cause increase in osteoblasts and increase deposit of calcium over the bone and thereby increasing strength of bones . This reduce osteoporosis

This will also stimulate increase absorption of Calcium from kineys

:)