Final answer:
Hypoparathyroidism is characterized by deficient production of PTH, leading to low blood calcium levels and associated complications like impaired muscle function and tetany, making the statement true.
Step-by-step explanation:
Hypoparathyroidism is indeed characterized by a deficient production of parathyroid hormone (PTH). This disorder results in abnormally low levels of blood calcium, which can lead to symptoms such as impaired muscle function and possibly tetany, a condition associated with severe, sustained muscle contraction. Therefore, the statement that hypoparathyroidism is deficient parathyroid hormone production is true.
Unlike hypoparathyroidism, hyperparathyroidism involves an overproduction of PTH, leading to excessive calcium being moved from the bones into the bloodstream, which can cause bone weakness, deformation, and fractures. Additionally, it can result in nervous system impairment due to high levels of blood calcium.