5369207
Description
Flashcards by 12calvertluisa, updated more than 1 year ago
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Created by 12calvertluisa
over 8 years ago
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| Question | Answer |
| describe the structure of the heart | LA,RA, LV, LA pulmonary vein, vena cava aorta, pulmonary artery |
| describe the route of the cardiac impulse | sa node (in ra), av node, down bundle of his, splits into bundle branches left and right, into purkinje fibres = contracts |
| define STROKE VOLUME CARDIAC OUTPUT HEART RATE what is the equation for cardiac output? | amount of blood PUMPED from heart ventricles EVERY BEAT. the VOLUME of blood EJECTED from the ventricles in ONE MINUTE. NUMBER OF TIMES THE VENTRICLES CONTRACT PER MINUTE sv/hr= ca |
| DEFINE CARDIOVASULAR DRIFT VENOUS RETURN | increase in SV + HR during prolonged exercise the blood returning to the heart |
| what are the average readings for STROKE VOLUME CARDIAC OUTPUT HEART RATE | 5ML/B 60-80L/min 70bpm |
| heart rate responses to exercise | anticipatory rise= adrenaline. increase as intensity increases. HR plateaus prior to max HR. rapid decrease after exercise but gradual to allow repay of oxygen dept. |
| what are the changes to SV during exercise | 1) increases as more O2 needed for energy in muscles and movement 2) when sub maximal exercise is reached it plateaus as the heart can no longer fill up efficiently at the speed it needs it(n be heightened by cardia hypertrophy) |
| WHAT ARE THE NEGITIVE CONCEQUENCES OF A LOW HEART RATE | less circulation develops long ventricular pauses |
| what is the CCC and what does it control | cardiac control cycle rhythm of the heart |
| what are the Nural controls of the CCC | CHEMORECEPTORS- sense decrease in pH and increase in co2 and decrease in O2 PROPRIORECPEPTORS- detects increase in movement BARORECEPTORS- sense increase of blood pressure |
| what are the intrinsic control of CCC | TEMPERUTURE- increases with exercise VENOUS RETURN- starlings law, more blood returning to the heart= more stretch |
| what are the hormonal control of CCC | Adrenaline- concentration increases with exercise. stimulates SA node |
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