what part of the endocrine system would be effected if radioactive isotopes erupted into the air”?
In theory, radioactive isotopes could affect pretty much any part of the endocrine system. But for the sake of this particular question which specifically mentions iodine, it would be the THYROID. Without getting into the nitty gritty details, iodine is an integral part of the thyroid gland’s production of thyroid hormone. Either too little (in areas of the world that are iodine deficient) or too much (in the case of, let’s say, iodine overload for whatever reason) are both bad.
