Thyroxine

question 59

Multiple Choice

Thyroxine

• A) is synthesized by iodination of free tyrosine molecules in the thyroid gland
• B) is the only hormone synthesized by the thyroid gland
• C) binds to plasma membrane receptors and activates adenylate or guanylate cyclase
• D) is transported to its target tissue free in solution in the blood
• E) synthesis requires iodination of a cellular protein in the thyroid

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