method of movement through the membrane

May 20th, 2015
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One method of movement through the membrane is diffusion. Diffusion is the movement of molecules from a region of higher concentration to one of lower concentration. This movement occurs because the molecules are constantly colliding

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As level Biology notesUnit 1 Biology and DiseaseBy Jonathan CurtisContentsAs level Biology notes1Contents2Section 1.1: Causes of Disease - Pathogens4Section 1.2: Epidemiology6Section 1.3: Lifestyle and Health7Section 2.1: Enzymes and Digestion10Section 2.2: Carbohydrates Monosaccharides12Section 2.3: Carbohydrates disaccharides and polysaccharides.13Section 2.4 Carbohydrate digestion14Section 2.5 Proteins15Section 2.6 Enzyme action17Section 2.7 Factors affecting enzyme action18Section 2.8 Enzyme inhabitation19Section 3.1 Investigating the structure of cells20Section 3.2 The electron microscope22Section 3.3 Structure of epithelial cells23Section 3.4 - Lipids26Section 3.5 The cell surface membrane27 Section 3.6 - Diffusion28Section 3.7 Osmosis29Section 3.8 Active transport30Section 3.9 Absorption in the small intestine31Section 3.10 Cholera32Section 3.11- Oral rehydration therapy33Section 4.1 Structure of the human gas-exchange system34Section 4.2 The mechanism of breathing36Section 4.3 Exchange of gas in the lungs38Section 4.4 Pulmonary tuberculosis40Section 4.5 Fibrosis, asthma and Emphysema43Section 5.1 The heart and heart disease45Section 5.2 The cardiac Cycle48Section 5.3 Heart Disease52Section 6.1 Defence mechanisms54Section 6.2 Phagocytosis55Section 6.3

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