An enlarged thyroid gland can lead to symptoms that reflect either overproduction or underproduction of thyroid hormones. Explain how both of these conditions are possible from an enlarged thyroid.
Essay #3. This is a tough topic to write about. I would recommend googling/researching “What conditions cause the thyroid to enlarge or swell?” Sort them into 2 categories, those that increase thyroid hormones and those that decrease thyroid hormones. Add information to explain the interactions.