AS Cardiac Output Word Scramble
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Question | Answer |
What is the definition of Stroke volume? | The volume of blood leaving the heart (left ventricle) per beat |
What is ejection fraction? | Proportion of blood in left ventricle pumped out each beat |
Name three venous return mechanisms? | Pocket valves / respiratory pump / skeletal pump / suction action of the heart |
What is starlings law | The greater the venous return (the greater the stretch of the heart) the greater the strength of contraction |
The relationship between Cardiac out put and stroke volume? | CO = SV X HR, if SV increases so doe cardiac output |
What is the term athlete’s heart mean? The increase in size of the heart that accompanies training. | The increase in size of the heart that accompanies training. |
What is the definition of cardiac out put? | Volume of blood leaving the heart per minute |
What is venous return? | The amount of blood returning to the heart |
What is heart rate? | The number of times the heart contracts and relaxes (cardiac cycles) per minute |
The variables that make up stroke volume? | Venous return / contractility of heart muscle / elasticity of heart muscles (starlings law) |
What does bradycardia mean? | The reduction in resting heart rate that accompanies training. |
What is the cardiovascular drift? | An increase in heart rate that occurs during prolonged steady exercise that compensates for a decrease in stroke volume in an attempt to maintain cardiac output. |
How does stroke volume increase during exercise? | More venous return, greater the filling of the ventricles , heart muscle stretches, greater strength of contraction (starlings law), greater ejection fraction |
What are the effects of exercise on heart rate? | Heart rate increases, stroke volume increases (starlings law), cardiac output increases because CO= SV X HR |
What happens to cardiac output at rest? | It remains the same, but stroke volume is higher and resting heart rate is lower. Effect of training |
Created by:
Tina Dean
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