Topic 1 (Lifestyle, Health & Risk) 0.0 / 5 ? BiologyU1 T1: Lifestyle, Health & RiskASEdexcel Created by: pippsicle96Created on: 09-02-14 17:19 Movement of molecules from an area of high concentration to an area of low concentration Diffusion 1 of 18 Blood travels AWAY from the heart through __________ Arteries 2 of 18 Small arteries Arterioles 3 of 18 Very small (THIN) blood vessels Capillaries 4 of 18 Blood travels TOWARDS the heart through _________ Veins 5 of 18 Small veins Venules 6 of 18 Blood containing oxygen is ___________ _______ Oxygenated blood 7 of 18 Blood not containing oxygen is ____________ _______ Deoxygenated blood 8 of 18 A substance is ________ if it doesn't dissolve in water, is non-polar, and repels water Hydrophobic 9 of 18 A substance is ____________ if it dissolves easily in water, is polar, and attracts water Hydrophilic 10 of 18 Walls of a blood vessel contains __________, which makes them strong and durable Collagen 11 of 18 Blood vessel walls also contain ______ ______ to allow them to stretch Elastic fibres 12 of 18 Veins contain _________ to help prevent the backflow of blood Valves 13 of 18 The process during which the heart fills with blood, then pumps it around the body is called the ________ ______ Cardiac Cycle 14 of 18 Because the heart is a muscle, it needs a blood supply - this is supplied through the _________ ________ Coronary Arteries 15 of 18 ______________ is a disease which is caused by fatty deposits building up in the blood vessels, and can lead to CHD and strokes Atherosclerosis 16 of 18 In the blood-clotting process, __________ is the soluble protein converted into thrombin Prothrombin 17 of 18 Thrombin is an enzyme which catalyses the conversion of fibrinogen (soluble protein) into the insoluble protein __________ Fibrin 18 of 18
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