Blood Vessels (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
What is the correct sequence of blood flow through the circulatory system?
What is the correct sequence of blood flow through the circulatory system?
Heart→Arteries→Arterioles→Capillaries→Veins
Which blood vessels transport blood away from the heart towards arterioles?
Which blood vessels transport blood away from the heart towards arterioles?
Arteries
What happens to artery walls during systole in the cardiac cycle?
What happens to artery walls during systole in the cardiac cycle?
Elastic walls stretch to accommodate blood
What is diastole in the cardiac cycle?
What is diastole in the cardiac cycle?
Heart relaxation phase
Why are arterioles called 'resistance vessels'?
Why are arterioles called 'resistance vessels'?
They constrict & dilate to control blood flow
What structural feature prevents backflow in veins?
What structural feature prevents backflow in veins?
Valves at intervals
What do capillary walls mainly consist of?
What do capillary walls mainly consist of?
Endothelium
What is the approximate diameter of capillaries?
What is the approximate diameter of capillaries?
7-10 micrometres
Which layer is the innermost in blood vessel structure?
Which layer is the innermost in blood vessel structure?
Endothelium
Why do arteries have much thicker walls than veins?
Why do arteries have much thicker walls than veins?
Arteries carry blood at high pressure