1. The parathyroids
2. Parathyroid hormone and vitamin D (which is actually a hormone)
When working correctly the parathyroids, of which there are 4, keep around 90% of the body's calcium in the bones and teeth and the remaining 10% in the bloodstream.
b. High calcium levels cause bone resorption
Because to much calcium build up can cause kidney stones.
vitamin D, calcitonin, and parathyroid hormone
The paraythyroid gland controls calcium homeostasis in the body.
Calcium
I consider that the most important is calcium carbonate (chalk) - CaCO3.
The four most important elements for life are food, water, shelter, and homeostasis.
cell homeostasis
The most common calcium isotope, calcium-40, has 20 neutrons.
The cell membrane is the most important in maintaining homeostasis. This is because the cell membrane controls what goes in and out of the cell.
calcium which is found in milk and most other dairy products.
endocrine and excretory system
Calcium
Calcium
Calcium
I consider that the most important is calcium carbonate (chalk) - CaCO3.
All organ systems regulate homeostasis for the body. I'm not sure which two are the most important. For example, the Regulatory System (lungs, trachea, etc.) regulate homeostasis by breathing. The Excretory System (Kidney, bladder, etc.) regulates homeostasis by removing wastes.
It's either phosphorus or calcium
calcium
Calcium, it strengthens bones.
Calcium (Ca) is a chemical element. Limescale is a mixture of compounds, the most important being the calcium carbonate (CaCO3).