Arteries, Veins and Capillaries 3.0 / 5 based on 1 rating ? Sports ScienceUniversityNone Created by: JoyCreated on: 16-01-13 18:36 What is the function of the adventitia? To provide structural strength and tethers the vessels in place 1 of 17 What is the function of the smooth muscle? To supply the vessels with contractile power and to regulate the diameter of the lumen 2 of 17 What is the function of the elastin? To give vessels mechanical strength and their elastic properties (expand and recoil) 3 of 17 What is the function of the pre-capillary sphinchter? To control blood flow to specific capillary beds selectively 4 of 17 The contraction of smooth muscle is controlled by: The autonomic nervous system 5 of 17 Actin filaments attach to the cell via specialised areas in the cytoplasm called: Dense bodies 6 of 17 What is the result of capillaries being thin and numerous It increases surface area to allow more gaseous exchange and facilitate diffusion in all parts of the body 7 of 17 What is the velocity of flow of blood in the capillaries relative to the aorta It is low because the total cross sectional area is larger, allowing more time for gaseous exchange to take place 8 of 17 Capillary endothelial arrangements is continuous in: muscle, nerve, fat and lymph nodes 9 of 17 Capillary endothelial arrangements is Fenestrated in: glands, kidney and intestines 10 of 17 Capillary endothelial arrangements is Discontinuous in: liver, bone marrow and spleen 11 of 17 What is the relationship between net pressure, hydrostatic pressure and colloid osmotic pressure? (Hydrostatic pressure)=(Colloid osmotic pressure)+(Net pressure) 12 of 17 What is the term given to veins that have leaky valves? Varicose veins 13 of 17 What opposes blood flowing in the correct direction of the veins Hydrostatoc pressure which forces blood away from the heart 14 of 17 Which two things does the Frank-Starling mechanism relate? Cardiac output and the displacement of blood from the veins to the heart 15 of 17 Inside which vessel would pressure be the lowest? Vessels preceeding entry to the right atrium 16 of 17 What factor/factors determines/determine Central Venous Pressure (CVP) Blood volume and compliance 17 of 17
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