In the formation of the thyroid hormones, 90% of the secreted thyroid hormone is _____, while _____ is the thyroid hormone that affects target cells.

a. thyroxine; T4
b. T4; T3
c. thyroglobulin; T3
d. T3; T4
e. thyroxine; thyroglobulin


Answer: b. T4; T3

Anatomy & Physiology

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