NEETZoologyChemical Coordination and Integration
What is the effect of parathyroid hormone (PTH) on renal tubules?
Options
- ADecreases reabsorption of calcium
- BIncreases reabsorption of calcium
- CDecreases reabsorption of potassium
- DIncreases reabsorption of potassium
Correct answer
B. Increases reabsorption of calcium
Step-by-step solution
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. It is, thus, clear that PTH is a hypercalcemic hormone, i.e., it increases the bloodCa2+ levels. Along with TCT, it plays a significant role in calcium balance in the body.The thymus gland is a lobular structure located between lungs behind s