All of the statements listed are true of thyroid hormones. They are derived from the amino acid tyrosine, but are lipid-soluble so they can diffuse through the cell membrane of target cells. Once inside the cell, thyroid hormones bind to intracellular receptors, which affect gene transcription and protein synthesis.

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Thyroid Hormones

Question 9

Multiple Choice

Thyroid hormones:

A) are amino acid derivatives
B) are lipid soluble
C) can diffuse through the cell membrane of the target cell
D) bind to intracellular receptors in the target cell
E) All of the above are true of thyroid hormones.

Correct Answer: