Epinephrine is a hormone of adrenal medulla, which stimulate the sympathetic nervous system and is responsible for fight-or-flight response. The stress-response pathway mediated by Epinephrine is fast-acting (immediate).
Cortisol is the major glucocorticoid released from the adrenal cortex during the stress. The stress response mediated by cortisol is slow acting.
Thus, the blanks can be filled with epinephrine; cortisol.