A - Unity and Diversity
B - Form and Function
C - Interaction and Interdependence
D - Continuity and Change
D1.1 DNA replication
D1.2 Protein synthesis
D1.3 Mutations and gene editing
D2.1 Cell and nuclear division
D2.2 Gene expression (HL)
D2.3 Water potential
D3.1 Reproduction
D3.2 Inheritance
D3.3 Homeostasis
D4.1 Natural selection
D4.2 Sustainability and change
D4.3 Climate change
View a summary cheatsheet for D3.3 Homeostasis
D3.3.1 Homeostasis
D3.3.2 Negative feedback loops in homeostasis
D3.3.3 Regulation of blood glucose as an example of the role of hormones in homeostasis
D3.3.4 Physiological changes that form the basis of type 1 and type 2 diabetes
D3.3.5 Thermoregulation as an example of negative feedback control
D3.3.6 Thermoregulation mechanisms in humans
D3.3.7 Role of the kidney in osmoregulation and excretion (HL)
D3.3.8 Role of the glomerulus, Bowman’s capsule and proximal convoluted tubule in excretion (HL)
D3.3.9 Role of the loop of Henle (HL)
D3.3.10 Osmoregulation by water reabsorption in the collecting ducts (HL)
D3.3.11 Changes in blood supply to organs in response to changes in activity (HL)
