When there is a deficiency of iodine in the diet,the thyroid gland enlarges and a simple or iron-deficiency goiter develops.What active hormone will be increased in this condition?
A) thyroxine
B) parathyroid hormone
C) calcitonin
D) thyroid-stimulating hormone
E) triiodothyronine

Question

Quizplus · Accepted Answer

In the case of iodine deficiency, the thyroid gland cannot produce enough thyroxine (T4) and triiodothyronine (T3), leading to a decrease in their levels. This decrease is detected by the hypothalamus and pituitary gland, which respond by increasing the secretion of Thyroid Stimulating Hormone (TSH). TSH stimulates the thyroid gland to produce more thyroid hormones and causes the thyroid gland to enlarge, resulting in a goiter.

When There Is a Deficiency of Iodine in the Diet,the