Question

Which of the following is true of thyroid hormones?

1. The three hormones secreted are thyroxine, triiodothyronine, and calcitonin.
2. Hyposecretion is cretinism in infants and children and myxedema in adults.
3. Hyposecretion may be the result of lack of iodine as well as radiation therapy and surgical removal of the thyroid.
4. Replacement therapy is lifelong.
5. Replacement therapy regimen should be taken in the mornings because of the hormone's side effect of insomnia.

Answer 1

Thyroid hormones, including thyroxine (T4), triiodothyronine (T3), and calcitonin, regulate metabolism in the body. Hyposecretion of thyroid hormones can lead to cretinism in children and myxedema in adults. Replacement therapy for hypothyroidism is lifelong, but there is no specific requirement to take medication in the morning.

Step-by-step explanation:

Thyroid hormones are important for regulating the body's metabolism. The three hormones secreted by the thyroid gland are thyroxine (T4), triiodothyronine (T3), and calcitonin. Hyposecretion of thyroid hormones can result in cretinism in infants and children, and myxedema in adults. This can be caused by iodine deficiency, as well as radiation therapy and surgical removal of the thyroid. Replacement therapy for hypothyroidism is lifelong, and usually involves taking synthetic hormone replacements. There is no specific requirement to take the medication in the morning, as insomnia is not a common side effect.