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.
Bones play an important role in regulating blood calcium levels, which must be maintained within narrow limits for functions such as muscle contraction and membrane potentials to occur normally.A deficiency of blood calcium is called hypocalcemia, and an excess of blood calcium is called hypercalcemia.Bone is the major storage site for calcium in the body, and movement of calcium into and out of bone helps to determine blood calcium levels.he hormones parathyroid hormone (PTH) and calcitonin help regulate blood calcium levels. Calcitonin, secreted by the thyroid gland inhibits osteoclasts and stimulates osteoblasts, thus decreasing blood calcium levels.