Topic 6.3: Defense against Infectious Disease

6.3 Defence against infectious disease

6.3.1

Define pathogen.

6.3.2

Explain why antibiotics are effective against bacteria but not against viruses.

6.3.3

Outline the role of skin and mucous membranes in defence against pathogens.

6.3.4

Outline how phagocytic leucocytes ingest pathogens in the blood and in body tissues.

6.3.5

Distinguish between antigens and antibodies.

6.3.6

Explain antibody production.

6.3.7

Outline the effects of HIV on the immune system.

6.3.8

Discuss the cause, transmission and social implications of AIDS.

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