Question

T4 and T3 are __________ hormones that are mainly transported __________ in the blood.
A. monoamine; bound to thyroxine-binding globulin (TBG)
B. monoamine; unbound (free)
C. steroid; bound to transcortin-binding protein (TBP)
D. steroid; unbound (free)
E. catecholamine; bound to thyroxine-binding globulin (TBG)

Answer

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