question_answer 22)

  Which of the following do not play any role in calcium balance in the human body? (a)Vitamin-D                  (b) Parathyroid hormone                 (c) Thyrocalcitonin              (d) Thymosin

Answer:

                (d) Thymosin hormone has no role in regulation of blood calcium homeostasis. It plays a major role in the differentiation of T-lymphocytes, which provides cell mediated immunity, While, vitamin-D, thyrocalcitonin and parathyroid hormone plays a vital role in maintaining calcium homeostasis by regulating blood calcium levels.