Agglutination describes which process related to blood elements?

Agglutination describes which process related to blood elements?

• A. The clumping of particulate formed elements in the blood vessels increasing viscosity
• B. Oxidation of blood
• C. Color change of tissues
• D. Lysis of red blood cells

Answer: (A)

Agglutination is the clumping together of particulate formed elements in the blood caused by antibodies binding to antigens on their surfaces. This cross-linking makes cells stick together, forming aggregates that can increase the viscosity of blood as they circulate in vessels. That directly matches the description of clumping of formed elements in the vessels and the resulting change in flow properties. The other options describe different processes—oxidation is a chemical change, color change of tissues isn’t about cell clumping, and lysis is the bursting of cells—not aggregation.

Agglutination is the clumping together of particulate formed elements in the blood caused by antibodies binding to antigens on their surfaces. This cross-linking makes cells stick together, forming aggregates that can increase the viscosity of blood as they circulate in vessels. That directly matches the description of clumping of formed elements in the vessels and the resulting change in flow properties. The other options describe different processes—oxidation is a chemical change, color change of tissues isn’t about cell clumping, and lysis is the bursting of cells—not aggregation.