Calcitonin is the other major hormone involved with calcium regulation. Parathyroid hormone (PTH), produced by the parathyroid gland, increases the level of calcium in the blo â¦ od. It usually accomplishes this by increasing the resorption rate (taking back) from bone.Calcitonin does the exact opposite and reduces calcium in the blood.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.
The Earth bulges slightly at the Equator; the average diameter of the Earth is 12,750 kilometres (7,922 mi), but the diameter at the Equator is about 43 kilometres (27 mi) greater than at the poles.
The first of these is the equator. The equator, located at 0Â°, is the longest line of latitude on Earth at 24,901.55 miles (40,075.16 km). It is significant because it is the exact center of the Earth and it divides that Earth into the Northern and Southern Hemispheres.he equator is a line going around Earth and is halfway between the North and South Poles, it is given a latitude of 0Â°. Values increase north of the equator and are considered positive and values south of the equator decrease and are sometimes considered negative or have south attached to them.