Multiple Choice
The most abundant form of thyroid hormone secreted into the blood is ; the most active form at the target cell is _; and the form that provides long- loop negative feedback is .
A) T4 : T4 : T3
B) T3 : T3 : T4
C) T3 : T4 : T4
D) T4 : T3 : T4
E) T3 : T4 : T3
Correct Answer:

Verified
Correct Answer:
Verified
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