An allergic response that is frequently life threatening is the result of which condition?

An allergic response that is frequently life threatening is the result of which condition?

• A. Agglutination
• B. DIC
• C. Hemolysis
• D. Anaphylaxis

Answer: (D)

Anaphylaxis is a rapid, life-threatening allergic reaction caused by the systemic release of chemical mediators from mast cells (often IgE-mediated). This release leads to widespread vasodilation, increased vascular permeability, airway edema, and bronchoconstriction, which can cause sudden shock and respiratory failure if not treated promptly. The description “frequently life threatening” fits anaphylaxis because of how quickly it can progress to shock and death without immediate intervention. The other terms describe different processes. Agglutination is the clumping of red blood cells due to antibodies, not a systemic allergic reaction. DIC (disseminated intravascular coagulation) is a dangerous clotting/bleeding disorder, not an allergic reaction. Hemolysis is the destruction of red blood cells, which is not an allergic response.

Anaphylaxis is a rapid, life-threatening allergic reaction caused by the systemic release of chemical mediators from mast cells (often IgE-mediated). This release leads to widespread vasodilation, increased vascular permeability, airway edema, and bronchoconstriction, which can cause sudden shock and respiratory failure if not treated promptly. The description “frequently life threatening” fits anaphylaxis because of how quickly it can progress to shock and death without immediate intervention.

The other terms describe different processes. Agglutination is the clumping of red blood cells due to antibodies, not a systemic allergic reaction. DIC (disseminated intravascular coagulation) is a dangerous clotting/bleeding disorder, not an allergic reaction. Hemolysis is the destruction of red blood cells, which is not an allergic response.