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(A) The Parathyroid Hormone $(PTH)$ is a peptide hormone secreted by the parathyroid glands.$(i)$ $PTH$ acts on bones and stimulates the process of bo

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$I, II, III$ and $IV$

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(A) The Parathyroid Hormone $(PTH)$ is a peptide hormone secreted by the parathyroid glands.$(i)$ $PTH$ acts on bones and stimulates the process of bone resorption (dissolution/demineralization),which releases calcium into the blood.$(ii)$ $PTH$ acts on the kidneys to stimulate the reabsorption of calcium from the renal tubules and suppresses the reabsorption of phosphate.$(iii)$ $PTH$ increases the absorption of calcium from the digested food in the intestine.$(iv)$ $PTH$ also influences muscle and nerve activity by maintaining calcium homeostasis,which is essential for proper neuromuscular function.Therefore,$PTH$ influences the Kidney $(I)$,Bone $(II)$,Muscle $(III)$,and Intestine $(IV)$. The Brain $(V)$ is not directly regulated by $PTH$ in the same manner as the other organs listed.Thus,the correct option is $A$.

Which of the following given organs are influenced by the activity of $PTH$?
The option containing all correct answers is
$I$. Kidney $II$. Bone $III$. Muscle $IV$. Intestine $V$. Brain

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Which of the following given organs are influenced by the activity of $PTH$?The option containing all correct answers is$I$. Kidney $II$. Bone $III$. Muscle $IV$. Intestine $V$. Brain