Adrenaline is a hormone produced by the
adrenal glands during high stress or exciting
situations. This powerful hormone is part of
the human body's acute stress response system,
also called the "fight or flight" response.
Where are the adrenal glands?
The adrenal glands are found directly above the kidneys in
the human body (7.62 cm in length). Adrenaline is one of
several hormones produced by these glands. Along with
norepinephrine and dopamine, it is a catecholamine, which
is a group of hormones released in response to stress. These
three hormones react with various body tissues, preparing the
body to react physically to the stress causing situation.
How it works?
It works by stimulating the heart rate,
contracting blood vessels, and
dilating air passages, all of which
work to increase blood flow to the
muscles and oxygen to the lungs.
For what can be used?
Additionally, it is used as a medical treatment
for some potentially life-threatening
conditions including anaphylactic shock. In the
US, the medical community largely refers to this
hormone as epinephrine, although the two terms
may be used interchangeably.
When it happens?
When a person is in a dangerous situation, the
hypothalamus in the brain alarms the adrenal glands
to release adrenaline and other hormones directly
into the bloodstream. The body's systems react to these
hormones, giving the person a nearly instant
physical boost. Strength and speed both increase, while
the body's ability to feel pain decreases.