ThyHormSynth — KinFAST

Adaptive test — questions are selected based on your ability estimate. — Tag: T3T4Compare

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A pharmacologist studies the two main thyroid hormones, T3 and T4. They have similar structures but distinct properties. Which combination best contrasts these two hormones?

Both T3 and T4 are equally abundant in the bloodstream and equally potent at receptors T4 (thyroxine, four iodines) is the more abundant form released into the bloodstream and serves largely as a precursor; T3 (triiodothyronine, three iodines) is less abundant but is much more potent at thyroid hormone receptors, and most T3 is generated from T4 at target tissues T3 and T4 contain no iodine and instead are derived from carbohydrate precursors T3 is more abundant in the bloodstream than T4 and is the main form that circulates in plasma

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