AQA A Level Biology复习笔记3.3.4 Mechanisms of Absorption
Mechanisms of Absorption Digestion breaks down food into smaller, soluble molecules The products of digestion are absorbed through the intestinal lining The absorption of amino acids and mon...
AQA A Level Biology复习笔记3.3.3 Enzyme Rate Practical
Practical Skill: Investing Factors Affecting Enzyme Reaction Rates When an enzyme is kept in conditions that are outside its optimum pH the shape of its active site may change As a result, e...
AQA A Level Biology复习笔记3.3.2 Enzymes in Digestion
Enzymes in Digestion Enzymes are substrate specific, meaning different enzymes digest and breakdown the different biological molecules contained in food Digestive enzymes are extracellular e...
AQA A Level Biology复习笔记3.2.11 Correlations & Causal Relationships - The Lungs
Correlations & Causal Relationships - The Lungs Correlation is an association or relationship between variables Causation occurs when one variable has an influence or is influenced by an...
AQA A Level Biology复习笔记3.2.10 Evaluating Data on Lung Disease
Investigating Risk Factors & the Incidence of Lung Disease A risk factor is any factor that correlates with (is linked to) an increased chance of suffering from a particular condition or...
AQA A Level Biology复习笔记3.2.9 Pollution & Smoking
The Effects of Pollution & Smoking on the Incidence of Lung Disease Exposure to pollution and smoking are well-known risk factors in relation to lung disease Environmental pollution sour...
AQA A Level Biology复习笔记3.2.8 The Effects of Lung Disease
The Effects of Lung Disease There are several disorders or diseases that can prevent lungs from functioning properly They can affect the structure of the alveolar walls (gas exchange surface...
AQA A Level Biology复习笔记3.2.7 PVR
Maths Skill: PVR The volume of air within the lungs of an individual will change depending on their level of activity When at rest, breathing is shallow and steady When exercising, breathing...
AQA A Level Biology复习笔记3.2.6 Ventilation & Gas Exchange
Ventilation & Gas Exchange Gas exchange in the lungs requires a concentration gradient Ventilation (mass flow of gases) in the lungs and the continuous flow of blood in the capillaries h...
