Igcse Model Questions Vol1 2017 Biology Question 5

Practice essay / theory question 5 from the 2017 Igcse Model Questions Vol1 Biology examination. This question covers Transport .

Igcse Model Questions Vol1 2017 Biology Essay / Theory

Topic: Transport

Question 5 IGCSE_MODEL_QUESTIONS_VOL1 • 2017 • BIOLOGY • essay

A student is studying the circulatory system of a mammal. She records an arterial blood pressure of 120 mmHg, a venous pressure of 10 mmHg and a total peripheral resistance of 20 mmHg·min·L⁻¹. The average heart rate is 75 beats per minute.

Question Parts

( a )

Calculate the cardiac output (CO) in litres per minute using the relationship CO = ΔP / R, where ΔP is the pressure difference between artery and vein and R is the resistance.

( b )

Using the cardiac output obtained in part (a), determine the average stroke volume (SV) in millilitres per beat.

( c )

Explain how the structural features of capillaries facilitate the exchange of nutrients and waste products between the blood and surrounding tissues.

( d )

Compare the transport of oxygen in blood with the transport of glucose in plasma. Discuss two major differences in the mechanisms and their physiological significance.

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About This Question

This is Igcse Model Questions Vol1 2017 Biology Question 5. It is one of the essay questions from the 2017 Igcse Model Questions Vol1 Biology examination.

The question covers Transport .

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