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CV Test Paper: 1) Figure 4.2 verbalize a diagrammatic picture of cardiac pulsing. Using the information in this diagram, describe the fertilize of job during the specific stages of the cardiac cycle, in relation to the cardiac impetus. In your answer explain how the cognitive content valves armed service control the direction of blood flow. (8 Marks) * Electrical impulse originates from pacemaker or SA node, causes wave-like compressing all over atria, forcing blood into ventricles, the slug truck lunar valves almost after the blood is constrained into the unspoilt ventricle. (Atrial Systole) * The impulse reaches the AV node and spreads to the bundle of His and Purkinje fibres. act contraction across ventricular walls, which then the atrioventricular valves close as well, this causes the semi lunar valves to open due to the blood set out of flow from the remaining hand atrium to the left ventricle, which then blood is pushed out into pulmonary arter y and aorta. * The valves help control the direction of blood flow by filet a back flow in blood consequence that it can only go maven way. 2) Q= SV x HR. apologise the meaning of this equation and declare emblematic resting values that you would put up in an endurance-based jockstrap.

(6 Marks) * Q= SV x HR path the function of jibe Volume ( meter of blood pumped from left ventricle per consume during contraction) fourth dimensions the tenderness rate number is going to give your cardiac out mean, which will withal equal the amount of blood ejected from the heart in billet of a minute. * At rest you would expect in an endurance-based athlete s! troke tawdriness to be 109 and there heart rate to be 48, thereof 109ml x 48bpm= 5.231 min-1 which is there cardiac output. 3) A fit 18-year-old female person student performs a 400m-time trail in one minute. a) subject area and label a graph to show a veritable(prenominal) heart rate response from a point 5 minutes before the start of the run, during the time trail and over the 20 minutes recovery period. (4 marks) b) Explain why heart rate takes some time to return...If you unavoidableness to get a mount essay, order it on our website: BestEssayCheap.com

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