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 carbohydratesChoose the most appropriate answer from the options given below:
medium
Chemical Coordination and Integration
2022
biology
(a) and (c) only
(b), (d), and (e) only
(a) and (e) only
(b) and (c) only
Explanation
To solve this problem, we need to identify which effects are not associated with Parathyroid hormone (PTH). Let's analyze each option:∙(a) Stimulates the process of bone resorption: - PTH increases bone resorption, releasing calcium into the blood. - This is an effect of PTH.∙(b) Decreases Ca²⁺ level in blood: - PTH actually increases the calcium level in the blood by stimulating bone resorption and increasing renal reabsorption of calcium.
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- PTH promotes the reabsorption of calcium in the kidneys, reducing its excretion.
- This is an effect of PTH.
∙
(d) Decreases the absorption of Ca²⁺ from digested food:
- PTH increases the absorption of calcium from the intestine indirectly by stimulating the production of active vitamin D.
- This is not an effect of PTH.
∙
(e) Increases metabolism of carbohydrates:
- PTH primarily regulates calcium and phosphate metabolism, not carbohydrate metabolism.
- This is not an effect of PTH.
Now, let's identify the options that are not effects of PTH:
(b) Decreases Ca²⁺ level in blood, (d) Decreases the absorption of Ca²⁺ from digested food, and (e) Increases metabolism of carbohydrates are not effects of PTH.
Therefore, the correct answer is Option 2: (b), (d), and (e) only.