Anxiety can be defined as emotions which are typically negative in nature. It will in most cases consist of fear and worry, and some organisms may even experience physical signs such as nausea or chest pains. Anxiety is a complex emotion, and is composed of a variety of different elements.
Some of these elements are somatic or cognitive, and the body will prepare itself to deal with an external threat.
The heart rate speeds up, and the blood pressure is increased. The various muscles in the body will also receive elevated levels of blood. At the same time, the functions of the digestive system will slow down.
People who have anxiety will generally have a sense of dread. A number of voluntary and involuntary processes will take place in the body, and the goal of these processes is to get the organism away from the source that is causing it to have anxiety. Anxiety is an important emotion, and is designed to increase the survival rate of organisms.
In humans it appears that anxiety comes from the hippocampus and amygdala, two regions of the brain. When a person senses bad odours or tastes, there will be a large amount of blood flow which will be present in the amygdala. The evidence also shows that medium levels of anxiety will be present in this situation as well.
Based on these studies, it appears that anxiety is designed to keep humans and other organisms from eating food or objects that may be harmful to their well being. While anxiety is normal, a person that has excessive amounts of it may have what is called an anxiety disorder.
In extreme cases, people with anxiety disorders may have strong cases where they are terrorized. Anxiety disorders
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