Adrenaline, also known as epinephrine, is a hormone and neurotransmitter that plays an important role in the body’s response to stressful situations. It is produced by the adrenal glands and released into the bloodstream in response to stress, physical activity, or danger. Adrenaline acts on both the central nervous system and various organs, helping the body quickly adapt to changing conditions.
The main function of adrenaline is to prepare the body for the fight or flight response. It increases the heart rate, increases blood pressure, dilates the bronchi in the lungs, which allows for improved oxygen supply to the tissues, and promotes pupil dilation to improve vision under stress. Adrenaline also raises blood glucose levels, providing the muscles with extra energy to react quickly.
Epinephrine is used medicinally to treat a number of conditions. Its injections are used in anaphylactic shock to quickly relieve severe allergic reactions, as well as in cardiac arrest to stimulate cardiac activity. Epinephrine is also an ingredient in some medications used to relieve bronchospasms in asthma patients.