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  • A person is having problems with calcium and phosphorus metabolism in his body. Which one of the following glands may not be functioning?  <div class='qna-opt

A person is having problems with calcium and phosphorus metabolism in his body. Which one of the following glands may not be functioning?

 

Option: 1

Parathyroid

 


Option: 2

Parotid

 


Option: 3

Pancreas

 


Option: 4

Thyroid


Answers (1)

best_answer

Parathyroid Gland & Its Disorders -

  • In humans, four parathyroid glands are present on the backside of the thyroid gland, one pair each in the two lobes of the thyroid gland.
  • The cells of the parathyroid glands are arranged in a compact mass and are of two types: small chief cells or principal cells and large oxyphil cells (or eosinophil cells).
  • The chief cells of the parathyroid secrete a hormone called parathy­roid hormone (PTH) or parathormone or also called Collip’s hormone.
  • This hormone regulates the calcium and phosphate balance between the blood and other tissues. 
  • It mobilises the release of calcium into the blood from the bones. 
  • PTH increases calcium absorption from the intestines. 
  • It increases calcium resorption from the nephrons (and inhibits phosphate reabsorption) of the kidneys.
  • Parathyroids are under the feeding back control of blood calcium level. 
  • A fall in blood calcium stimulates them to secrete parathormone, a rise in blood calcium inhibits parathor­mone secretion from them. 
  • Thus PTH has an effect that opposes the effect of calcitonin.
     

Hence, the correct option is a. parathyroid 

  

 

 

Posted by

Gautam harsolia

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