Hyperthyroidism can be due to all of the following EXCEPT which one? A)too much TRH B)too much TSH C) lack of iodine D) too much T₄ or T₃

Question

Quizplus · Accepted Answer

Hyperthyroidism is typically caused by an excess of thyroid hormone, either as a result of an overactive thyroid gland (Graves’ disease or toxic multinodular goiter) or from taking too much thyroid hormone medication. Lack of iodine, on the other hand, can lead to hypothyroidism (an underactive thyroid gland) rather than hyperthyroidism. Option A (too much TRH) and option B (too much TSH) can both potentially lead to hyperthyroidism, as high levels of these hormones can stimulate the thyroid gland to produce more thyroid hormone. Option D is not a valid answer choice as it does not correspond to any known hormone or other substance that could cause hyperthyroidism.

Hyperthyroidism Can Be Due to All of the Following EXCEPT