How does adrenalin affect the body?

Answer 1

A hormone that is created by the adrenal gland, adrenalin is found in many animals, including human beings. When the body produces this hormone, the heart-rate is stimulated and other effects on the body take place. Although there are many situations in which adrenalin is produced in large quantities, situations that cause high emotional or physical stress are the most likely to encourage its production.
About three inches long in the human body, the adrenal glands are located right above the kidneys. When the adrenal glands are active and functioning properly, around 20% of the substances released by the adrenal glands is noradrenalin while 80% is adrenalin.
In extremely stressful situations, a "fight or flight" response is sometimes used. In this case, the body releases adrenalin which stimulates the heart rate and dilates the blood vessels. It also expands air passages. All of these things work together in order to allow the body is circulate more oxygen into the lungs as well as more blood throughout the body. Because more blood can go into the muscles at this time, some people are able to find themselves with more strength than they usually possess. This relates back to the evolutionary process when adrenalin used as a physical response that humans and animals were able to use to defend and protect themselves.

In small doses, adrenalin is sometimes administered during health crisis in order to re-stimulate the heart rate or during allergic reactions. It's important that this only be administered in the right quantities, however, or else adverse reactions can occur. also when you are under the effect of adrenaline blood pmps into your muscles and it stops going to least important things like hair and nail growth etc.