1. 3 Lines of Defense: Answer -Mechanical Barriers & body secretions that secrete enzymes or chemicals to inactivate or destroy potentially damaging material. -Phagocytosis (cell eating), Inflammation (limits the effect of injury) , & Interferons (protect uninfected cells against viruses). -The Immune Response - specific response based on memory. 2. First Line of Defense: Answer nonspecific or general defense mechanismis a mechanical barriersuch asskin or mucous membrane that blocks entry of bacteria or harmful substances into the tissues 3. Second Line of Defense: Answer includes the nonspecific processes of phagocytosis and inflammation. 4. Third Line of Defense: Answer is the specific defense mechanism in the body. 5. The inflammatory response: Answer -is a protective mechanism and an important basic concept in pathophysiology. -is a normal defense mechanism in the body and is intended to localize and remove an injurious agen 6. inflammation: Answer is the body's nonspecific response to tissue injury, resulting in redness, swelling, warmth, pain, and sometimes a loss of function.