Circulatory System in Animals (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
How many times does the cardiac cycle repeat per minute during rest?
How many times does the cardiac cycle repeat per minute during rest?
Approximately 70 times
What is systole?
What is systole?
When heart muscle contracts
How does blood flow from atria to ventricles during diastole?
How does blood flow from atria to ventricles during diastole?
Passively due to pressure difference
Which valves close to produce the 'lub' sound?
Which valves close to produce the 'lub' sound?
Atrioventricular valves
What percentage of ventricular filling does atrial systole contribute?
What percentage of ventricular filling does atrial systole contribute?
10-15%
When do heart valves open?
When do heart valves open?
When pressure favours forward flow
Where are semi-lunar valves located?
Where are semi-lunar valves located?
In aorta and pulmonary artery
What is the formula for cardiac output?
What is the formula for cardiac output?
Heart rate stroke volume
What is the minimum pressure that aortic pressure falls to?
What is the minimum pressure that aortic pressure falls to?
Approximately 12 kPa
Why is the left ventricle particularly muscular?
Why is the left ventricle particularly muscular?
To pump blood to all body tissues