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. Choose the most appropriate answer from the options given below:
Answer: (B) , (d) and (e) only. Answer: (b) (b), (d) and (e) only Solution: PTH is a hypercalcemic hormone: it stimulates bone resorption (a, correct effect), reabsorption of Ca2+ by renal tubules (c, correct effect), and increases Ca2+ absorption from digested food.
- A.and (c) only
- B., (d) and (e) only✓
- C.and (e) only
- D.and (c) only
Correct Answer
(B) , (d) and (e) only
Solution & Explanation
Answer: (b) (b), (d) and (e) only Solution: PTH is a hypercalcemic hormone: it stimulates bone resorption (a, correct effect), reabsorption of Ca2+ by renal tubules (c, correct effect), and increases Ca2+ absorption from digested food. Therefore the statements that are NOT effects of PTH are (b) decreases blood Ca2+ (PTH increases it), (d) decreases gut Ca2+ absorption (PTH increases it), and (e) increases carbohydrate metabolism (that is a thyroid hormone role). So (b), (d) and (e) are not PTH effects. NCERT Reference: Chapter 19, Page 243, Line(s) 26-30 — "Parathyroid hormone (PTH) increases the Ca2+ levels in the blood. PTH acts on bones and stimulates the process of bone resorption (dissolution/demineralisation). PTH also stimulates reabsorption of Ca2+ by the renal tubules and increases Ca2+ absorption from the digested food."