The function carried out by this protein forms the first and rate-limiting step in the process of iodide accumulation by the thyroid gland.(A) Na+/K+/ATPase(B) Na+/I− cotransporter (also called Na+/I− symporter)(C) An as yet unidentified iodide channel(D) Thyroid stimulating hormone (TSH) receptor(E) Thyroglobulin Checking your answer...