In humans, stress triggers many responses. short term stress response includes an increase in the overall metabolic rate, increased blood glucose, and increased heart rate. these changes are caused by a rely of cell communications that eventually lead to the release of from the adrenal medulla.

Epinephrine

Explanation:

The hormone named epinephrine which is released during stress conditions is commonly known as adrenaline.

This hormone responds rapidly to the stress conditions by increasing the heart rate and rushing the blood into brain and muscles.

It also increases the blood sugar level by conversion of Glycogen into glucose.

hence, the answer is Epinephrine.

The hypothalamus. a region of the forebrain below the thalamus that coordinates both the autonomic nervous system and the activity of the pituitary, controlling body temperature, thirst, hunger, and other homeostatic systems, and involved in sleep and emotional activity.