What is the primary hormone responsible for physiological stress responses such as increased heart rate,bronchiole dilation,pupil dilation,and blood diversion?

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Epinephrine, also known as adrenaline, is the primary hormone responsible for physiological stress responses such as increased heart rate, bronchiole dilation, pupil dilation, and blood diversion. It is released by the adrenal glands in response to stress and activates the sympathetic nervous system to prepare the body for fight or flight. Cortisol and ACTH are also involved in stress responses but not primarily responsible for the physiological changes listed. Thyroxine is a hormone produced by the thyroid gland that regulates metabolism and does not directly contribute to stress responses.

What Is the Primary Hormone Responsible for Physiological Stress Responses