Dr. KThyroid_Study_Guide_-1

What is the chemical structure of T4 (Thyroxine)?

• Two tyrosine molecules linked with two iodine atoms

• Two tyrosine molecules linked with four iodine atoms

• One tyrosine molecule linked with four iodine atoms

• Two tyrosine molecules linked with three iodine atoms

What is the generic name for T4?

• Synthroid

• Levoxyl

• Levothyroxine

• Thyroxine

Which of the following is a common brand name for T4?

• Levothyroxine

• Synthroid

• Thyroxine

• Iodothyronine

What process is inhibited by thioamides in thyroid hormone synthesis?

• Organification

• Coupling

• Both organification and coupling

• Neither organification nor coupling

What is organification in the context of thyroid hormone synthesis?

• Formation of T4 from T3

• Incorporation of iodine into tyrosine residues

• Conversion of T4 to T3

• Breakdown of thyroglobulin

What is the process of coupling in thyroid hormone synthesis?

• Formation of T4 and T3 from MIT and DIT

• Breakdown of T4 into T3

• Iodination of tyrosine

• Conversion of T3 to T4

Which of the following is NOT a brand name for T4?

• Synthroid

• Levoxyl

• Levothyroxine

• Thyroxin

What does MIT stand for in thyroid hormone synthesis?

• Monoiodothyronine

• Monoiodotyrosine

• Monoiodothyroxine

• Monoiodothyronate

What does DIT stand for in thyroid hormone synthesis?

• Diiodothyronine

• Diiodotyrosine

• Diiodothyroxine

• Diiodothyronate

Which step in thyroid hormone synthesis involves the formation of MIT and DIT?

• Coupling

• Organification

• Iodination

• Deiodination