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2. Parathyroid hormone - Wikipedia

   en.wikipedia.org/wiki/Parathyroid_hormone

   Secretion of parathyroid hormone is determined chiefly by serum ionized calcium concentration through negative feedback. Parathyroid cells express calcium-sensing receptors on the cell surface. PTH is secreted when [Ca 2+ ] is decreased (calcitonin is secreted when serum calcium levels are elevated).

3. Parathyroid gland - Wikipedia

   en.wikipedia.org/wiki/Parathyroid_gland

   The parathyroid gland produces and secretes parathyroid hormone in response to low blood calcium, which plays a key role in regulating the amount of calcium in the blood and within the bones. Parathyroid glands share a similar blood supply, venous drainage, and lymphatic drainage to the thyroid glands.

4. Endocrine gland - Wikipedia

   en.wikipedia.org/wiki/Endocrine_gland

   The parathyroid glands, of which there are 4–6, are found on the back of the thyroid glands, and secrete parathyroid hormone, [2] This causes an increase in blood calcium levels by targeting bone, the intestine, and the kidneys. The parathyroid hormone is the antagonist of calcitonin. Parathyroid hormone release is triggered by falling blood ...

5. Thyroid - Wikipedia

   en.wikipedia.org/wiki/Thyroid

   The thyroid hormones influence the metabolic rate and protein synthesis and growth and development in children. Calcitonin plays a role in calcium homeostasis. [1] Secretion of the two thyroid hormones is regulated by thyroid-stimulating hormone (TSH), which is secreted from the anterior pituitary gland.

6. Parathyroid chief cell - Wikipedia

   en.wikipedia.org/wiki/Parathyroid_chief_cell

   The four parathyroid glands are embedded in the thyroid gland. The chief cells of the parathyroid glands sense the amount of calcium in the blood, and release the calcium-increasing hormone parathyroid hormone (PTH) accordingly to correct or maintain normal blood calcium levels. [8]

7. Endocrine system - Wikipedia

   en.wikipedia.org/wiki/Endocrine_system

   Epithelial cells of the parathyroid glands are richly supplied with blood from the inferior and superior thyroid arteries and secrete parathyroid hormone (PTH). PTH acts on bone, the kidneys, and the GI tract to increase calcium reabsorption and phosphate excretion.

8. Hyperparathyroidism - Wikipedia

   en.wikipedia.org/wiki/Hyperparathyroidism

   Secondary hyperparathyroidism is due to physiological (i.e. appropriate) secretion of parathyroid hormone (PTH) by the parathyroid glands in response to hypocalcemia (low blood calcium levels). The most common causes are vitamin D deficiency [47] (caused by lack of sunlight, diet or malabsorption) and chronic kidney failure.

9. Hypothalamic–pituitary–thyroid axis - Wikipedia

   en.wikipedia.org/wiki/Hypothalamic–pituitary...

   primary hyperthyroidism: Inappropriate secretion of thyroid hormones, e.g. in case of Graves' disease. secondary hyperthyroidism: Rare condition, e.g. in case of TSH producing pituitary adenoma or partial thyroid hormone resistance. Thyrotoxicosis: Over-supply with thyroid hormones, e.g. by overdosed exogenously levothyroxine supplementation.