When adrenaline is secreted into the blood, our body undergoes several physiological changes in response to the “fight or flight” stress response. Adrenaline, also known as epinephrine, is a hormone released by the adrenal glands in response to stress or danger. Here’s how our body responds:
1. Increased heart rate: Adrenaline causes the heart to beat faster, increasing blood flow to the muscles and vital organs. This prepares the body for physical exertion.
2. Elevated blood pressure: Adrenaline constricts blood vessels, leading to an increase in blood pressure. This helps to deliver oxygen and nutrients to the muscles and brain more efficiently.
3. Dilated airways: Adrenaline relaxes the muscles surrounding the airways, allowing for increased airflow. This helps to improve oxygen intake and enhance respiratory function.
4. Enhanced glucose release: Adrenaline stimulates the liver to release stored glucose into the bloodstream. This provides a quick source of energy for the body to use during the stress response.
5. Increased mental alertness: Adrenaline acts on the brain, increasing focus, attention, and alertness. This heightened state of awareness helps us to react quickly to potential threats or challenges.
6. Suppressed non-essential functions: Adrenaline temporarily suppresses non-essential bodily functions such as digestion and immune response. This allows the body to prioritize energy and resources towards immediate survival needs.
7. Heightened strength and speed: Adrenaline triggers the release of stored energy in the muscles, leading to increased strength and speed. This enables us to respond quickly and effectively in a potentially dangerous situation.
It’s important to note that while adrenaline can be beneficial in short-term stress situations, prolonged or excessive adrenaline release can have negative effects on our health. Chronic stress can lead to various health issues, including cardiovascular problems, weakened immune system, and mental health disorders.
For more information, you can refer to the following sources:
– Mayo Clinic: https://www.mayoclinic.org/healthy-lifestyle/stress-management/in-depth/stress/art-20046037
– Healthline: https://www.healthline.com/health/adrenaline-rush#effects