How is the majority of reverse T3 produced?

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Enhance your knowledge with the Ciulla Clinical Chemistry Test. Study with interactive quizzes, featuring flashcards and multiple-choice questions. Each question offers hints and explanations for better understanding. Prepare effectively and excel in your exam!

Multiple Choice

How is the majority of reverse T3 produced?

Explanation:
The majority of reverse T3 is produced by peripheral conversion of T4 through inner-ring deiodination in peripheral tissues. This reaction, driven by type 3 deiodinase, converts T4 into reverse T3, an inactive metabolite. The thyroid gland itself does not generate most of reverse T3; thyroglobulin is simply a storage/prohormone precursor, not a source of reverse T3. So, peripheral deiodination of T4 is the key pathway producing the bulk of reverse T3.

The majority of reverse T3 is produced by peripheral conversion of T4 through inner-ring deiodination in peripheral tissues. This reaction, driven by type 3 deiodinase, converts T4 into reverse T3, an inactive metabolite. The thyroid gland itself does not generate most of reverse T3; thyroglobulin is simply a storage/prohormone precursor, not a source of reverse T3. So, peripheral deiodination of T4 is the key pathway producing the bulk of reverse T3.

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