12 Questions
Thyroid peroxidase enzyme catalyzes the coupling of iodine to form T3 and T4.
False
T3 is 15 times more potent than T4.
False
Thyroid hormones increase lipogenesis and cholesterol levels in blood.
False
Hashimoto's disease is a cause of primary hypothyroidism.
True
Iodine deficiency is a common cause of secondary hypothyroidism.
False
T4 is converted to T3 in the cell nucleus.
False
Thyroid-stimulating hormone (TSH) is synthesized by the hypothalamus.
False
High levels of T4 and T3 in the blood stimulate the secretion of TRH and TSH.
False
The thyroid gland secretes two hormones: T4 and insulin.
False
Thyroglobulin is synthesized in the smooth endoplasmic reticulum of follicular cells.
False
The thyroid gland facilitates normal growth and maturation of tissues by maintaining the optimal level of metabolism required for their normal function.
True
The thyroid gland secretes a hormone that increases serum calcium levels.
False
Test your understanding of how thyroid hormone is regulated in the body, including the role of TSH, TRH, and feedback inhibition. Also, learn about the importance of thyroid hormone in tissues growth and maturation.
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