Practical Skill: Visking Tubing Investigating the absorption of the products of digestion using Visking tubing Visking tubing?(sometimes referred to as dialysis tubing) is a non-living?parti...
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...
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...
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...
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...
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...
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...
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...
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...
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...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 3.9.1 F What is a non-linear graph? A?linear?graph is a?straight-line graph These are easily identified as their equations can always be written in the form y = m...
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