Which of the following are not the effects of Parathyroid hormone? (a) Stimulates the process of bone resorption (b) Decreases Ca2+ level in blood (c) Reabsorption of Ca2+ by renal tubules (d) Decreases the absorption of Ca2+ from digested food (e) Increases metabolism of carbohydrates
(b) and (c) only
(a) and (c) only
(b), (d) and (e) only
(a) and (e) only
Parathyroid hormone (PTH) increases Ca2+ levels in the blood (hypercalcemic hormone) . It acts on bones and stimulates the process of bone resorption (dissolution/demineralisation) . It also stimulates the reabsorption of Ca2+ by the renal tubules and increases Ca2+ absorption from digested food . Therefore, decreasing Ca2+ levels (b), decreasing absorption from food (d), and regulating carbohydrate metabolism (e) are NOT effects of PTH. Carbohydrate metabolism is regulated by thyroid hormones and glucocorticoids .
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