Norepinephrine or norepinephrine is a hormone and also a neurotransmitter in the sympathetic nervous system.
It is produced in the medulla of the adrenal gland and released directly into the bloodstream. It can also be secreted by postganglionic neurons in the sympathetic nervous system.
This substance is produced from the amino acid tyrosine.
The formula for noradrenaline is C8H11AT THE3.
Occupation
Norepinephrine is responsible for and relates to several functions in the body. The primary function of its mechanism of action is to prepare the body for a particular action. Hence, it is known as a "fight or flight" substance.
In response to stress, the body releases norepinephrine and adrenaline in moments of fright, surprise or strong emotions.
At that moment, the two hormones trigger a series of reactions throughout the body, such as:
- constriction of blood vessels;
- faster breathing;
- enlarged pupils;
- acceleration of heartbeats.
Norepinephrine works to maintain heartbeat, glucose levels and blood pressure.
It also acts on the brain and regulates activities such as sleep and emotions. In large quantities, it provides a feeling of well-being. While in small amounts, it is related to the onset of symptoms of depression.
Norepinephrine is also related to cognitive processes of learning, creativity and memory.
Noradrenaline keeps the body alert and alert during the day and during sleep its levels decrease.
Learn more, read too:
- Hormones
- Neurotransmitters
- Endocrine Glands
- Peripheral Nervous System
- Nervous system
Adrenaline and Noradrenaline
At adrenal gland there are cells that secrete adrenaline, while others secrete noradrenaline.
Like norepinephrine, adrenaline it is a hormone in the human body, secreted by the adrenal glands.
Adrenaline is released in cases of extreme stress and serves as a defense mechanism for rapid action by the body.
Despite having similar functions, the two substances act independently. Norepinephrine is produced before adrenaline.
Meet other neurotransmitters:
- Acetylcholine
- Endorphin
- Serotonin
- dopamine
