Answer:
Adrenocorticotropic hormone (ACTH)
Step-by-step explanation:
During stress condition, the pituitary gland located in the brain receives a stimulatory signal from the hypothalamus and releases the Adrenocorticotropic hormone .
The Adrenocorticotropic circulate in the brain and when reaches the adrenal gland causes the release of the cortisol and the epinephrine or adrenaline from the adrenal gland cortex.
These two hormones along with norepinephrine acts in the adrenergic receptors and produces the stress response or fight or flight response.
Thus, Adrenocorticotropic hormone is the correct answer.