What do parathyroid glands do?


As part of a more complex feedback loop which includes parathyroid hormone, vitamin D and to some extent phosphorous and magnesium it is the role of the parathyroid glands to automatically and precisely monitor our blood calcium levels and keep it within a very finely tuned ‘normal’ range. It does this by secreting more or less parathyroid hormone in response to any fluctuations in the level of calcium in our blood.


Below is a basic illistration of the PTH Feeback Loop (also called Calcium Homeostasis).

PTH Feedback Loop

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