Injured tissue releases chemicals called____ that mediate the four cardinal signs of inflammation, which are _, __,_ , and_____.

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Step 1: Understand the context of the problem. The question is asking about the chemicals released by injured tissue and the four cardinal signs of inflammation. These are fundamental concepts in the study of the immune response and tissue repair.

Step 2: Recall that injured tissue releases chemicals known as inflammatory mediators. Examples include histamine, prostaglandins, cytokines, and leukotrienes. These chemicals play a role in initiating and regulating the inflammatory response.

Step 3: Identify the four cardinal signs of inflammation. These are redness (rubor), heat (calor), swelling (tumor), and pain (dolor). These signs are caused by the effects of the inflammatory mediators on blood vessels and surrounding tissues.

Step 4: Connect the chemicals to the signs of inflammation. For example, histamine causes vasodilation, leading to redness and heat. Prostaglandins can sensitize nerve endings, contributing to pain. Increased vascular permeability caused by cytokines leads to swelling.

Step 5: Summarize the relationship between the chemicals and the signs of inflammation. Injured tissue releases inflammatory mediators, which act on blood vessels and tissues to produce the four cardinal signs: redness, heat, swelling, and pain.

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Chemical Mediators of Inflammation

Chemical mediators are substances released by injured tissues that initiate and regulate the inflammatory response. These include histamines, prostaglandins, and cytokines, which play crucial roles in increasing blood flow, attracting immune cells, and promoting healing.

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Inflammation

Cardinal Signs of Inflammation

The four cardinal signs of inflammation are redness, heat, swelling, and pain. Redness and heat result from increased blood flow to the affected area, swelling is due to the accumulation of fluid and immune cells, and pain arises from the release of chemicals that stimulate nerve endings.

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Inflammation

Inflammatory Response

The inflammatory response is a protective biological reaction to tissue injury or infection. It involves the activation of immune cells, the release of chemical mediators, and changes in blood flow, all aimed at containing and eliminating harmful agents while promoting tissue repair.

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