Like the M 1 and M 3 muscarinic receptor, M 5 receptors are coupled with G proteins of class Gq that upregulate phospholipase C and, therefore, inositol trisphosphate and intracellular calcium as a signaling pathway.
Radioactive iodine is a very effective type of treatment for cancer of the thyroid gland. Thyroid cells absorb iodine. The radioactive iodine from the drink or capsule is absorbed into your body and picked up by the thyroid cancer cells wherever they are. So it can kill the cancer cells even if they have spread.
Radioactive Iodine: This oral medication is absorbed by your thyroid gland. Radioactive iodine works by gradually destroying the thyroid. This, in turn, reduces your hyperthyroid symptoms. This treatment is effective at permanently curing hyperthyroidism, and there are very little side effects on the rest of your body. Some may require a repeat of this treatment.