Dexamethasone is a drug used to suppress the secretion of adrenocorticotropic hormone (acth) from the anterior pituitary. two patients with hypersecretion of cortisol are given dexamethasone. patient a‘s cortisol secretion falls to a normal level, but patient b's cortisol levels remain high. what is wrong with patient b's endocrine signaling system? relate this human condition to the insect hormone system we discussed in lecture. is patient b's condition similar to the insect system in any way?