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APTER 23 THE HEMATOLOGIC AND LYMPHATIC SYSTEMS 77 2. Which describes the function of albumin? a. To absorb the salts from food for use by body cells b. To maintain fluid volume and blood pressure c. To contribute to the body's chemical and fluid balance d. To protect against blood loss and foreign body invasion 3. Which describes the structure or function of antibodies? a. They are insoluble threads that entrap red blood cells and platelets. b. They decrease the release of chemical mediators during allergic reactions. c. They are materials synthesized by the body in response to antigens. d. They are involved in phagocytosis and defense against bacteria. 4. Which describes hematopoiesis or hemopoiesis? a. Clumping of cells b. Engulfing and devouring of invaders c. Process of forming fibrin d. Formation of blood cells 5. Which factor controls the chemical and acid-base balance of the blood? a. Maintenance of the electrolytic salts within the plasma b. Volume of circulating blood with individ- ual body size c. Manufacturing of formed elements of the blood d. Removal of the hematologic waste products 6. Which promotes the clotting of blood? a. Albumin b. Globulin c. Prothrombin d. Heparin