TRH stimulates the pituitary gland to produce thyroid-stimulating hormone, or TSH, and another function of TSH is to maintain the structural integrity of the thyroid gland. Given these facts, what stimulates the pituitary gland in order to maintain structural integrity of the thyroid among the following options:
- TRH
 - Urea
 - CO 2
 - PDAs
 - HPV
 - SO2
 - mL
 - p53


 

 TRH        