Which substance is essential for the thyroid to function normally and help prevent goiter?

Prepare for the NLN PAX Science Exam with flashcards and multiple choice questions. Each question includes hints and detailed explanations to boost your confidence and exam readiness.

Multiple Choice

Which substance is essential for the thyroid to function normally and help prevent goiter?

Explanation:
Iodine is the nutrient the thyroid uses to make its hormones. Thyroid hormones, T4 and T3, each contain iodine; without enough iodine, the gland can’t produce these hormones effectively. When hormone levels drop, the pituitary signals the thyroid to work harder by releasing more TSH, and this stimulation causes the gland to grow. The increased size is what we call a goiter. So, adequate iodine intake keeps the thyroid producing hormones and helps prevent the gland from enlarging. Other nutrients listed don’t play that direct role in making thyroid hormones or preventing goiter. Iron is important for other body functions, while vitamin C and calcium have unrelated roles.

Iodine is the nutrient the thyroid uses to make its hormones. Thyroid hormones, T4 and T3, each contain iodine; without enough iodine, the gland can’t produce these hormones effectively. When hormone levels drop, the pituitary signals the thyroid to work harder by releasing more TSH, and this stimulation causes the gland to grow. The increased size is what we call a goiter. So, adequate iodine intake keeps the thyroid producing hormones and helps prevent the gland from enlarging.

Other nutrients listed don’t play that direct role in making thyroid hormones or preventing goiter. Iron is important for other body functions, while vitamin C and calcium have unrelated roles.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy