A 43-year-old lady arrives to the office feeling more and more worn out and gaining weight while eating less. I haven't been feeling like myself lately, she says. The patient requests to be sent to a dermatologist since her formerly "lovely" skin has started to dry up. She believes that a dermatologist can also assist with her hair loss issue. High serum TSH, low triiodothyronine (T3), and low thyroxine (T4) levels are found by laboratory analysis. The patient requests to take this drug since a member of her family who suffers from fatigue found that their energy level improved after using liothyronine (T3) supplements. Which of the following changes in the patient's hormone levels would be most probable as a result of this therapy's administration?

Question

Quizplus · Accepted Answer

Eductional Objective: The thyroid is stimulated by TSH from the anterior pituitary to create thyroxine (T4) and a tiny quantity of triiodothyronine (T3). T4 is transformed into T3 (the active form) and reverse T3 in peripheral tissues (inactive form). Thyroid hormone exerts a negative feedback on the hypothalamus and pituitary, which inhibits TSH production.

A 43-Year-Old Lady Arrives to the Office Feeling More and More