Parathorm integrity (PTH) is a polypeptide of 84 amino acids that is produced and secreted by parathyroid gaffer cellular phones. PTH regulates the concentration of atomic number 20 ions (Ca2+) in the stock certificate, this is important be originator Ca2+ is need for square-toed muscle and nerve function. Low calcium blood levels (hypocalcemia) cause muscle spasms, tetany and cardiac problems. PTH also regulates blood inorganic phosphate and magnesium levels. High blood calcium levels (hypercalcemia) with high blood phosphate levels can cause precipitation of calcium phosphate leading to organ damage.
Low blood calcium causes much parathyroid hormone production and secretion while high blood calcium does the opposite. Low blood calcium concentrations are detected by calcium sense organs in the membranes of the parathyroid glands. These receptors are of the G protein receptor family, activating this receptor leads to production of second messengers and reduces the concentration of intracellular cAMP by inhibiting adenylate cyclase - this leads to physiological change in the cell which then starts secreting parathormone into the blood. Parathormone travels to the bones where it stimulates osteoclasts (cells responsible for take up and removing bone tissue) to release calcium and phosphate from the bones stomach into the blood. PTH also travels to the kidneys where it induces the conversion of vitamin D into its active homunculus. The active form vitamin D then travels to the intestinal epithelial cells where it induces the production of calcium-binding proteins, thereby increasing calcium absorption. PTH also travels to the kidneys where it increases calcium reabsorption; hence less calcium is lost in the urine. Another motion PTH has on the kidneys is the reduction of reabsorption of phosphate; therefore more phosphate is lost through urine.
This raises the blood calcium levels because change magnitude phosphate in the blood causes extracellular calcium to be deposited in the bone - PTH eliminates extra phosphate to make room...
thats why they designate more and more calcium in the toothbrush, don& international ampere;amp;acute;t they?
anyway, good resarch on that theme. salubrious written.
I am nearly finished with a nursing ground level and i had to do some work on this like subject. It is a good essay. The topic is a difficult one for those who dont really have much medical background.
Sincerely, Lori
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