In iodine deficiency
A) TSH increases due to decreased negative feedback by T3
B) TSH increases due to stress
C) TSH increases due to LATS
D) T3 levels are unaffected because iodine is recycled from DIT and MIT and so TSH is normal
E) TSH decreases due to CNS depression

Question

Quizplus · Accepted Answer

In iodine deficiency, the thyroid gland cannot produce sufficient amounts of thyroid hormones (T3 and T4). This leads to decreased negative feedback on the pituitary gland, which in turn increases the secretion of Thyroid Stimulating Hormone (TSH) to try and stimulate more thyroid hormone production.

In Iodine Deficiency