Adrenaline, also known as epinephrine, is commonly referred to as the "fight or flight" hormone.
Understanding the Fight-or-Flight Response
The "fight or flight" response is a physiological reaction that occurs in response to a perceived harmful event, attack, or threat to survival. This response is triggered by the release of adrenaline from the adrenal glands.
How Adrenaline Works:
- Adrenaline increases heart rate and blood pressure.
- It boosts energy levels.
- It increases breathing rate.
- It diverts blood flow to muscles.
These physiological changes prepare the body to either confront the threat (fight) or escape from it (flight).
Other Hormones Involved in Stress Response
While adrenaline is the primary hormone associated with the "fight or flight" response, other hormones also play a significant role:
- Noradrenaline (Norepinephrine): This hormone works alongside adrenaline to enhance the effects of the fight-or-flight response. It's also a neurotransmitter.
- Cortisol: Often called the "stress hormone," cortisol helps regulate the body's response to long-term stress. It increases blood sugar levels to provide energy and slows down non-essential bodily functions.
Key References:
- Cleveland Clinic: Epinephrine (Adrenaline): What It Is, Function, Deficiency & Side Effects This article explains the role of epinephrine (adrenaline) in the body's fight-or-flight response.
- Harvard Health: Understanding the stress response This resource provides a detailed overview of the body's stress response, including the role of epinephrine.
- Byjus: What is fight or flight hormone? This source clearly identifies adrenaline and noradrenaline as "fight or flight" hormones.
- Johns Hopkins Medicine: Adrenal Glands This source explains the function of the adrenal medulla in controlling hormones involved in the flight or fight response.
