Q CLINICAL CASE REPORT Chapter 7 Running Problem: Graves’ Disease 1.a. To which of the three classes of hormones do thyroid hormones belong? b. ) If a person’s diet is low in iodine, predict what happens to thyroxine production. 2. a) In a normal person, when thyroid hormone levels in the blood increase, will negative feedback increase or decrease the secretion of TSH? b) In a person with a hyperactive gland that is producing too much thyroid hormone, would you expect the level of TSH to be higher or lower than in a normal person?