Physiology Percentage of T4 and T3 released from thyroid gland? A 50% T4 ; 50% T3 B 25% T4 ; 75% T3 C 80% T4 ;20% T3 D 1000% T4 ;0% T, 💡 Explanation Percentage of T4 and T3 released from thyroid gland? ✓ Correct Answer: C. 80% T4 ;20% T3