A - Unity and Diversity
B - Form and Function
C - Interaction and Interdependence
C1.1 Enzymes and metabolism
C1.2 Cell respiration
C1.3 Photosynthesis
C2.1 Chemical signalling (HL)
C2.2 Neural signalling
C3.1 Integration of body systems
C3.2 Defense against disease
C4.1 Populations and communities
C4.2 Transfer of energy and matter
D - Continuity and Change
View a summary cheatsheet for C3.2 Defense against disease
C3.2.1 Pathogens as the cause of infectious diseases
C3.2.2 Skin and mucous membranes as a primary defence
C3.2.3 Sealing of cuts in skin by blood clotting
C3.2.4 Differences between the innate immune system and the adaptive immune system
C3.2.5 Infection control by phagocytes
C3.2.6 Lymphocytes as cells in the adaptive immune system that cooperate to produce antibodies
C3.2.7 Antigens as recognition molecules that trigger antibody production
C3.2.8 Activation of B-lymphocytes by helper T-lymphocytes
C3.2.9 Multiplication of activated B-lymphocytes
C3.2.10 Immunity as a consequence of retaining memory cells
C3.2.11 Transmission of HIV in body fluids
C3.2.12 Infection of lymphocytes by HIV with AIDS as a consequence
C3.2.13 Antibiotics
C3.2.14 Evolution of resistance to several antibiotics
C3.2.15 Zoonoses
C3.2.16 Vaccines and immunization
C3.2.17 Herd immunity and the prevention of epidemics
C3.2.18 Evaluation of data related to the COVID-19 pandemic
