All the following statements regarding parathyroid hormone are correct except:
1. | It is a peptide hormone |
2. | It is regulated by a tropin secreted by anterior pituitary |
3. | It stimulates the process of bone resorption or demineralization |
4. | It stimulates calcium absorption from the digested food |
All the following regarding parathyroid glands are true except:
1. | They usually include four small glands. |
2. | They are embedded in the posterior surfaces of the lateral lobes of the thyroid gland. |
3. | They secrete parathyroid hormone and calcitonin. |
4. | They play a critical role in calcium homeostasis. |
Which one of the following pairs correctly matches a hormone with a disease resulting from its deficiency?
1. Relaxin-Gigantism | 2. Prolactin-Cretinism |
3. Parathyroid hormone-Tetany | 4. Insulin-Diabetes insipidus |
I: | In bone, PTH enhances the release of calcium from the large reservoir contained in the bones. |
II: | \((HPO^{2-}_4)\) from the tubular fluid. | In the kidney, PTH stimulates reabsorption of calcium but inhibits the reabsorption of phosphate
III: | It activates vitamin D, which in turn enables intestinal epithelium to absorb calcium. |