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Wednesday, November, 11, 2009

What Are The Main Functions Of The Immune System

Health Encyclopedia: Stress The Body's Response

The Body's Response


The best way to envision the effect of acute stress is to imagine yourself in a primitive situation, such as being chased by a bear.

The Brain's Response to Acute Stress

In response to seeing the bear, a part of the brain called the hypothalamic-pituitary-adrenal (HPA) system is activated.

Release of Steroid Hormones and the Stress Hormone Cortisol. The HPA systems trigger the production and release of steroid hormones (glucocorticoids), including the primary stress hormone corti...

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Health Guide

Fibromyalgia: Causes
...system known as the hypothalamus-pituitary-adrenal gland (HAP) axis. The HAP axis controls important functions, including sleep, response to stress, and depression. Changes in the HAP axis appear... Read more »
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...foreign substances, such as bacteria. This exposure prompts the lymphocytes to perform their immune functions. The size of a lymph node varies generally from that of a pinhead to a bean. Most... Read more »
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...thyroiditis and Graves' disease (a form of hyperthyroidism) are caused by a similar immunologic dysfunction. Similar immune system substances called antibodies are present in both diseases, and... Read more »
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