Final answer:
Bone loss in hyperparathyroidism occurs due to excessive bone resorption from the overproduction of parathyroid hormone, leading to reduced bone density, fragility, and an increased risk of fractures.
Step-by-step explanation:
Bone loss in hyperparathyroidism is primarily seen as a decrease in bone density, often leading to spontaneous fractures and skeletal deformities. This condition arises from an excess of parathyroid hormone (PTH) in the bloodstream, which increases bone resorption and results in an excessive release of calcium from the bones into the blood.
In hyperparathyroidism, the overproduction of PTH causes excessive calcium reabsorption from bone, compromising structural integrity and making bones fragile. High levels of blood calcium can also reduce the responsiveness of the nervous system and lead to deposits of calcium in other tissues and organs. Moreover, complications such as renal osteodystrophy and vascular calcification can occur, further impairing bodily functions.