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.
Parathyroid hormone opposes the effect of calcitonin, a hormone  produced by the thyroid gland that regulates calcium levels. It  removes calcium from its storage sites in b â¦ ones and releases it  into the bloodstream.alcitonin slows the release of calcium from bones into  bloodstream, thereby keeping blood levels of calcium to a minimum.    Parathyroid hormone does the opposite.