The "Iodine Pump" Refers to the

Multiple Choice

The "iodine pump" refers to the

A) mechanism whereby target cells extract iodine-containing thyroid hormone from the blood
B) active transport mechanism that concentrates iodine in the thyroid
C) mechanism whereby T₃ and T₄ are released from thyroglobulin and pumped into the circulation
D) protein binding process whereby T₃ and T₄ are pumped throughout the body bound to plasma proteins
E) mechanism whereby ingested iodine is absorbed by the small intestine