Which of the options, A to D, correctly identifies a primary non-specific defence, a secondary non-specific defence, and a specific immune response in mammals?
Primary non-specific: Blood clotting; Secondary non-specific: Phagocytosis; Specific: Clonal expansion of B lymphocytes
Primary non-specific: Phagocytosis; Secondary non-specific: Lysozyme in tears; Specific: Production of antibodies
Primary non-specific: Mucus secretion; Secondary non-specific: T-cell activation; Specific: Inflammation
Primary non-specific: Skin barrier; Secondary non-specific: Production of antibodies; Specific: Phagocytosis by neutrophils
40 exam-style questions on OCR A A Level Biology Communicable diseases, disease prevention and the immune system. Each one has a worked solution and a mark scheme showing where the marks go.