Which gland is the source of parathyroid hormone (PTH)?

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Study for the NCLEX Endocrine System Test with flashcards and multiple choice questions; each question comes with hints and explanations. Get ready for your exam!

Multiple Choice

Which gland is the source of parathyroid hormone (PTH)?

Explanation:
Parathyroid hormone is produced by the parathyroid glands. When blood calcium is low, PTH is released to raise it. It does this by three main actions: stimulating bone to release calcium through osteoclast activity, increasing calcium reabsorption in the kidneys, and promoting production of calcitriol (active vitamin D) in the kidneys, which boosts intestinal calcium absorption. By contrast, the thyroid gland makes calcitonin, which helps lower calcium, while the pituitary and adrenal glands produce other hormones with different roles.

Parathyroid hormone is produced by the parathyroid glands. When blood calcium is low, PTH is released to raise it. It does this by three main actions: stimulating bone to release calcium through osteoclast activity, increasing calcium reabsorption in the kidneys, and promoting production of calcitriol (active vitamin D) in the kidneys, which boosts intestinal calcium absorption. By contrast, the thyroid gland makes calcitonin, which helps lower calcium, while the pituitary and adrenal glands produce other hormones with different roles.

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