Final answer:
Hyperparathyroidism is a condition characterized by high serum calcium levels, low serum phosphate levels, bone destruction, and the formation of kidney stones. It can also cause nervous system impairment. Hypoparathyroidism, the underproduction of parathyroid hormone, leads to low levels of blood calcium and impaired muscle function.
Step-by-step explanation:
Hyperparathyroidism is a condition that occurs due to overproduction of parathyroid hormone. This leads to high serum calcium levels, low serum phosphate levels, bone destruction, and the formation of kidney stones. Additionally, it can result in nervous system impairment. On the other hand, hypoparathyroidism, which is the underproduction of PTH, leads to extremely low levels of blood calcium and impaired muscle function.