Answer 17

17.  Choice C is the correct answer.  Since the CRH, ACTH, and Cortisol are all low this implies tertiary adrenal insufficiency.  The hormones are all low because there is no stimulation beginning with the CRH in the hypothalamus.  If the CRH and ACTH are high, and the Cortisol is low, this implies primary adrenal insufficiency.  If the CRH is high, and the ACTH and the Cortisol is low this implies secondary adrenal insufficiency.  Cushing syndrome is when there is high cortisol and low ACTH.