Biology 9700/22 May June 2023 | Cambridge AS Level Past Papers With Mark Scheme

- Cardiac cycle regulation: sinoatrial node (SAN), atrioventricular node (AVN), systole, diastole, blood flow efficiency.
- Blood pressure dynamics: tricuspid valve opening, pulmonary valve opening, blood flow facilitation, valve function.
- Root structure analysis: root apical meristem, root cap, mucilage composition, polysaccharides, amino acids, enzyme activity.
- Immune response characteristics: non-self antigens, immune cell types, clonal expansion, cytokine secretion, primary immune response.
- Nucleotide analogues: nucleosides, nitrogenous bases, purines, pyrimidines, viral DNA synthesis interference.
- Gas exchange system: Weibel Lung model, airway generations, airway diameter measurements, imaging techniques, pulmonary disease assessment.