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In this video I discuss the psychological components of stress and how we can become stressed from the anticipation of threats. Psychological stressors are especially dangerous because they have the potential to become chronic stressors which constantly plague us. Next I discuss the relationship between stress and peptic ulcers, including Barry Marshall and Robin Warren's Nobel prize-winning research on the Helicobacter pylori bacteria and gastritis. This example demonstrates how chronic stress can cause the expression or worsening of symptoms by suppressing the immune system.

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