Topic 2.4: Cell recognition and the immune system (AQA A-level Biology)

This bundle contains 6 lesson PowerPoints and their accompanying resources, all of which have been planned at length to contain a wide variety of tasks that will engage and motivate the students whilst the detailed content of topic 2.4 of the AQA A-level Biology specification is covered.

The following specification points are covered in this lesson bundle:

• The identification of cells including pathogens through use of the surface molecules
• The antigen
• The effect of antigen variability on disease and disease prevention
• The phagocytosis of pathogens and the subsequent destruction by lysozymes
• The response of T lymphocytes to a foreign antigen in the cellular response
• The role of antigen-presenting cells
• The role of helper T cells
• The response of B lymphocytes in the humoral response
• The definition and structure of an antibody
• The formation of an antigen-antibody complex and the destruction by agglutination and phagocytosis
• The roles of plasma cells and memory cells in the primary and secondary responses
• The use of vaccinations and the concept of herd immunity
• The differences between active and passive immunity
• The structure of HIV and its replication in helper T cells
• How HIV causes the symptoms of AIDS
• Why antibiotics are ineffective against viruses
• The use of antibodies in the ELISA test

The variety of tasks include exam-style questions with detailed mark schemes, class discussion points of selected questions and quiz competitions to introduce values and
terms in a memorable way

If you would like to sample the quality of this lesson bundle, then download the roles of B and T lymphocytes lesson and the HIV and AIDS lesson as these have both been uploaded for free