In fact, the first laser that was assembled in 1954 using a source of microwaves to energize or stimulate the electrons in a cloud of ammonia and form a coherent beam of light. It was called a MASER or microwave amplified by stimulated emission of radiation.
The parathyroid glands produce hormones that regulate calcium levels. Calcitonin produced by the thyroid gland, and PTH produced by the parathyroid gland.arathyroid hormone (PTH) and calcitonin regulate blood calcium levels. PTH increases the calcium concentration in the blood, and calcitonin decreases it. 2 people found this useful. Edit.
This test measures a substance called parathyroid hormone (PTH) in your blood. PTH is made by four tiny parathyroid glands in your neck. PTH circulates in your blood and is needed to regulate the level of calcium in your blood.our heart, bones, nervous system, and kidneys need a normal calcium level in the blood to work the way they should. If your calcium level is too low, your parathyroid glands release PTH to get more calcium into your blood.