Igcse Model Questions Vol1 2019 Biology Question 5

Practice essay / theory question 5 from the 2019 Igcse Model Questions Vol1 Biology examination. This question covers Transport, Circulatory system, Blood, Respiration .

Igcse Model Questions Vol1 2019 Biology Essay / Theory
Topics: Transport Circulatory system Blood Respiration
Question 5 IGCSE_MODEL_QUESTIONS_VOL1 • 2019 • BIOLOGY • essay

The circulatory system transports nutrients, gases and waste products throughout the human body.

Question Parts

( a )
Describe the complete pathway of blood from the right side of the heart to the lungs and back to the left side of the heart, mentioning the role of the valves encountered.
( b )
Explain how oxygen is transported in the blood and why haemoglobin is essential for this process.
( c )
A mountaineer ascends to an altitude of 3000 m where the atmospheric pressure is lower. Discuss how this altitude affects the transport of oxygen in the blood and the physiological adjustments that help maintain oxygen delivery to tissues.
( d )
During moderate exercise a student’s heart rate rises from a resting 70 bpm to 110 bpm. (i) Calculate the percentage increase in heart rate. (ii) Explain why the heart rate increases during exercise in terms of transport requirements.
( ) Calculate the percentage increase in heart rate.
( ) Explain why the heart rate increases during exercise in terms of transport requirements.

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About This Question

This is Igcse Model Questions Vol1 2019 Biology Question 5. It is one of the essay questions from the 2019 Igcse Model Questions Vol1 Biology examination.

The question covers Transport, Circulatory system, Blood, Respiration .

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