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Thyroxine Is a Peptide Hormone, but Its Mechanism Is Different

Question 85

Multiple Choice

Thyroxine is a peptide hormone, but its mechanism is different from other peptide hormones. Which of the following statements is True concerning this difference?


A) It causes positive feedback.
B) It does not require a second messenger to effect a response.
C) It is very specific in the cell type it targets.
D) It is a stimulant of cellular metabolism and targets all cells.

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