Inflammatory Response Mechanisms

The inflammatory response is a rapid reaction to infection or injury, characterized by swelling, heat, redness, and pain. It involves changes in blood vessels, such as increased diameter and permeability, and the activation of endothelial cells. The response serves to defend against pathogens, induce clotting, and repair tissue. It is triggered by tissue damage or pathogen recognition, leading to the release of inflammatory mediators like cytokines and chemokines. Key cytokines include C5a and TNF-α, which play roles in leukocyte recruitment and vascular changes. Enzyme cascades like the kinin and coagulation systems also contribute to the response.

What causes the heat and redness observed during inflammation?

• Increased vascular diameter

• Activation of leukocytes

• Decreased blood flow

• Release of histamine

Which of the following is NOT a purpose of the inflammatory response?

• Inducing local blood clotting

• Defending against microorganisms

• Promoting tissue repair

• Increasing blood pressure

What triggers the release of inflammatory mediators?

• Physical damage to tissues

• Activation of leukocytes

• Increased blood flow

• Decreased vascular permeability

Which cytokine is known for stimulating the oxidative burst in neutrophils?

• Interferon-gamma

• Interleukin-6

• TNF-α

• C5a

What is the role of chemokines in the inflammatory response?

• They reduce inflammation

• They cause blood clotting

• They act as chemoattractants for phagocytes

• They increase vascular permeability

Which adhesion molecule appears on endothelial cells shortly after pathogen detection?

• P-selectin

• E-selectin

• VCAM-1

• ICAM-1

What is the first wave of cells to cross the blood vessel wall during inflammation?

• Monocytes

• Neutrophils

• Eosinophils

• Lymphocytes

Which cascade is responsible for producing bradykinin?

• Coagulation cascade

• Kinin cascade

• Complement cascade

• Fibrinolytic cascade

What is the function of bradykinin in the inflammatory response?

• Decreases vascular permeability

• Promotes blood clotting

• Reduces leukocyte recruitment

• Increases vascular permeability and causes pain

What is the result of the coagulation cascade activation?

• Formation of a fibrin clot

• Release of cytokines

• Increased leukocyte recruitment

• Decreased vascular permeability