Thyroxine
A) has fewer iodine atoms than triiodothyronine.
B) stimulates the release of thyroid-stimulating hormone.
C) has more target cells than ADH.
D) All of the above are true of thyroxine.

Question

Quizplus · Accepted Answer

Thyroxine (T4) has more iodine atoms than triiodothyronine (T3), not fewer. It does not stimulate the release of thyroid-stimulating hormone; rather, it is regulated by it. Thyroxine affects a wide range of cells in the body, more so than ADH, which primarily targets the kidneys.