11.2 ACTIONS OF ANTIBODIES

Antigens are destroyed by _______ through several mechanisms.

• antibodies

• lysosome

• phagocyte

How many mechanisms of actions of antibodies to destroyed antigens ?

• 3

• 4

• 5

Antibodies combine with antigens and act as a marker for phagocytes to recognise the antigens and destroy it.

• lysis

• agglutination

• opsonisation

Antibodies bind with toxins produced by bacteria and neutralise the toxin.

• precipitation

• agglutination

• neutralisation

Antibodies combine with antigens and cause bacteria to be broken down and decomposed.

• lysis

• neutralisation

• precipitation

Antibodies coagulate pathogens and make them easy target to be trapped and destroyed by phagocytes

• neutralisation

• agglutination

• precipitation

Antibodies react with dissolved antigens to form an insoluble complex (precipitate) that is easily destroyed by phagocytes.

• opsonisation

• precipitation

• agglutination