Скачать или смотреть AQA GCSE Biology Revision: Enzymes, Digestion, and Cardiovascular Health Explained

The video covers three critical areas:
• Enzymes and Metabolism: Learn how enzymes act as biological catalysts using the "lock and key" model to control metabolism. The session explains how the active site functions, the importance of complementary shapes, and how factors like temperature and pH can lead to denaturation.
• The Digestive System: This section explores the human digestive system, including the alimentary canal and accessory organs. It details the chemical breakdown of food by amylase, protease, and lipase, as well as the vital roles of stomach acid and bile in neutralisation and emulsification.
• Cardiovascular Health: Gain a clear understanding of the double circulatory system, the structure of the heart, and the differences between arteries, veins, and capillaries. The video also addresses coronary heart disease, its risk factors, and medical interventions such as statins, stents, and heart valve replacements.