Regulation of Blood Calcium via PTH and Calcitonin

The video explains the negative feedback regulation of blood calcium levels, focusing on the roles of osteoclasts and osteoblasts. It details how low blood calcium triggers the release of parathyroid hormone (PTH), which stimulates osteoclasts to increase calcium levels. Conversely, high blood calcium levels lead to the release of calcitonin from the thyroid, stimulating osteoblasts to deposit calcium into bones. The video emphasizes the importance of maintaining calcium levels for vital functions like blood clotting, muscle contraction, and nerve impulses.

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