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level: Level 1

Questions and Answers List

level questions: Level 1

QuestionAnswer
If TPR falls and cardiac output does not change, what happens to arterial and venous pressureArterial pressure will fall Venous pressure will rise
If cardiac output is increased, while TPR stays the same, what happens to arterial and venous pressureArterial pressure will rise Venous pressure will fall --> this is due to blood being pumped rapidly out of the veins so there is reduction in pressure
What is demand led pumpingIf the body needs more blood, then the heart needs to pump more to meet the ‘demand’ This demand is expressed as changes in arterial and venous pressure
What is the ultrasound of the heartEchocardiogram
What is the relationship between ventricular filling and venous pressureThe higher the venous pressure the more the heart fills in diastole This is known as ventricular compliance curve
What is the Starlings Law for the heartThe more the heart fills the harder it contracts (up to a limit) The harder it contracts the bigger the stroke volume Rises in venous pressure automatically lead to rises in stroke volume
In a stroke volume and venous pressure graph, what does the slope representContractility of the ventricle
What determines the force of contractionEnd diastolic volume Contractility Contractility Increased by sympathetic activity
Relationship between arterial and venous pressure with stroke volumeIf venous pressure rises → stroke volume will rise If arterial pressure falls → stroke volume will rise
In the Autonomic nervous system, which part increases heart rateReducing parasympathetic activity Increasing sympathetic activity