Answer
Normally the human body concentrates $I_{2}$ in the thyroid gland. The purpose of the large doses of $KI$ is to displace radioactive $I_{2}$ from the thyroid and allow its excretion from the body.
Work Step by Step
Normally the human body concentrates $I_{2}$ in the thyroid gland. The purpose of the large doses of $KI$ is to displace radioactive $I_{2}$ from the thyroid and allow its excretion from the body.