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.
Excess of calcium is also known as hypercalcemia. Balance of calcium in blood is maintained by parathormone, which is secreted by parathyroid glands. They are situated in the neck, just behind the thyroid gland. Primarily, it is parathyroid gland which regulates the calcium level in our body.