Parathyroid Gland
Tiny glands on posterior aspect of lobes of thyroid gland – usually two pairs of glands, but can vary – 3-8mm long and 2-5mm wide. Two types of cells – oxyphil cells (function unclear) and chief cells (secrete PTH).
Parathyroid hormone (PTH)/Parathormone:
• single chain polypeptide consisted of 84 amino acids
• controls calcium balance of blood. Release is stimulated by falling serum calcium levels and inhibited by high serum levels of calcium
• secretion responds to serum ionised calcium concentration
Effects of hormone:
increases osteoclast activity release of ionic calcium
increases resorption of calcium by renal tubules
increases absorption of calcium by intestinal mucosal cells
We have not yet got to this page. We will eventually. Please contact us if you have something to contribute to it or sign up for our newsletter or like us on Facebook and Instagram or follow us on Twitter. |
Page last updated:
Comments are closed.