Final answer:
Iodine deficiency disrupts thyroid function and can cause goiter. Goiter is the enlargement of the thyroid gland due to the impaired ability to produce T3 and T4 hormones. This condition can lead to symptoms of hypo- or hyperthyroidism.
Step-by-step explanation:
Iodine deficiency disrupts thyroid function and can cause goiter. Dietary iodine deficiency can result in the impaired ability to synthesize T3 and T4 hormones, leading to the accumulation of colloid in the thyroid gland and an overall increase in its size. This enlargement of the thyroid gland is known as goiter. Goiter is a visible indication of iodine deficiency, and it can cause symptoms such as hypothyroidism or hyperthyroidism.