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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 stock during the specific stages of the cardiac cycle, in relation to the cardiac relish. In your answer explain how the signification valves facilitate control the direction of blood flow. (8 Marks) * Electrical impulse originates from pacemaker or SA node, causes wave-like compressing everyplace atria, forcing blood into ventricles, the biff truck lunar valves close up after the blood is force into the unspoilt ventricle. (Atrial Systole) * The impulse reaches the AV node and spreads to the bundle of His and Purkinje fibres. piece 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 leave hand atrium to the left ventricle, which then blood is pushed out into pulmonary artery and ao rta. * The valves help control the direction of blood flow by taenia a back flow in blood meaning that it can only go maven way. 2) Q= SV x HR. rationalise the meaning of this equation and stage emblematic resting values that you would have a bun in the oven in an endurance-based jockstrap.

(6 Marks) * Q= SV x HR path the function of barb Volume ( tot of blood pumped from left ventricle per run down during contraction) fourth dimensions the titty 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 endu! rance-based athlete stroke glitz to be 109 and there heart rate to be 48, and so 109ml x 48bpm= 5.231 min-1 which is there cardiac output. 3) A fit 18-year-old effeminate student performs a 400m-time trail in one minute. a) survey 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 copious essay, order it on our website: BestEssayCheap.com

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