Final answer:
The parathyroid gland is associated with parathyroid hormone (PTH), which helps regulate the level of calcium in the blood.
Step-by-step explanation:
The parathyroid gland is associated with the hormone called parathyroid hormone (PTH).
PTH helps regulate the level of calcium in the blood. When blood calcium levels are low, the parathyroid glands release PTH. PTH stimulates the release of calcium from bones into the blood, increases the absorption of calcium in the intestines, and decreases excretion of calcium by the kidneys.