Which of the following are not the effects of Parathyroid hormone? Choose the most appropriate answer from the options given below:
- A and C only
- B, D and E only
- A and E only
- B and C only
Answer
(2) B, D and E only
Solution
As per NCERT, parathyroid hormone (PTH) increases the Ca2+ level in the blood (hypercalcemic hormone).
⇒ It acts on bones and stimulates bone resorption (dissolution / demineralisation) — A is an effect.
⇒ It stimulates reabsorption of Ca2+ by the renal tubules — C is an effect.
⇒ It increases (not decreases) Ca2+ absorption from the digested food — D is not an effect.
⇒ Since PTH raises blood Ca2+, B is not an effect.
⇒ Carbohydrate metabolism is regulated by insulin, glucagon, glucocorticoids and thyroid hormones, not by PTH — E is not an effect.
∴ B, D and E are not the effects of PTH.
Answer: (2)