You are presented with the question "What is TSH regulated by?" and the following answer choices: 
- pituitary
 - sweating
 - animals
 - glucose
 - heat or cold
 - heat produced
 - temperature
 - organ

Now knowing that tRH stimulates the pituitary gland to produce thyroid-stimulating hormone, or TSH and tRH synthesis is regulated directly by thyroid hormones, choose the best answer.


 

 pituitary        