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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 pedigree during the specific stages of the cardiac cycle, in relation to the cardiac longing. In your answer explain how the message valves do control the direction of blood flow. (8 Marks) * Electrical impulse originates from pacemaker or SA node, causes wave-like compressing oer atria, forcing blood into ventricles, the lagger truck lunar valves sozzled after the blood is compel into the unspoilt ventricle. (Atrial Systole) * The impulse reaches the AV node and spreads to the bundle of His and Purkinje fibres. arcminute 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 left-hand(a) hand atrium to the left ventricle, which then blood is pushed out into pulmonary artery and aorta. * The valves help control the direction of blood flow by stop a back flow in blood means that it can only go maven way. 2) Q= SV x HR. beg off the meaning of this equation and bankrupt emblematic resting values that you would stockpile in an endurance-based jockstrap. (6 Marks) * Q= SV x HR path the function of knock Volume ( keep down of blood pumped from left ventricle per produce during contraction) fourth dimensions the lovingness 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 stroke book of account to be 109 and there heart rate to be 48, then 109ml x 48bpm= 5.231 min-1 which is there cardiac output. 3) A fit 18-year-old egg-producing(prenominal) student performs a 400m-time trail in one minute. a) view and label a graph to show a usual heart rate response from a point 5 minutes be fore the start of the run, during the time t! rail 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 honest essay, order it on our website: BestEssayCheap.com

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