T4 and T3 are ________ hormones that are mainly transported ________ in the blood.

A. monoamine; unbound (free)
B. monoamine; bound to thyroxine-binding globulin (TBG)
C. steroid; bound to transcortin-binding protein (TBP)
D. catecholamine; bound to thyroxine-binding globulin (TBG)
E. steroid; unbound (free)


Answer: B

Anatomy & Physiology

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