Ijmb Model Questions Vol1 2019 Biology Question 5

Practice essay / theory question 5 from the 2019 Ijmb Model Questions Vol1 Biology examination. This question covers Transport .

Ijmb Model Questions Vol1 2019 Biology Essay / Theory

Topic: Transport

Question 5 IJMB_MODEL_QUESTIONS_VOL1 • 2019 • BIOLOGY • essay

Consider the circulatory system of a healthy adult human.

Question Parts

( a )

Describe, in order, the complete pathway that blood follows from the left ventricle back to the right atrium, naming all major chambers and vessels encountered.

( b )

Cardiac output (CO) is the product of stroke volume (SV) and heart rate (HR). Given an average SV of 70 mL per beat and a resting HR of 72 beats min⁻¹, (i) calculate the resting cardiac output in litres per minute, showing all steps, and (ii) discuss two physiological mechanisms that increase cardiac output during moderate exercise.

( c )

When a person ascends to high altitude, the partial pressure of oxygen in alveolar air falls. Explain how this change influences the transport of oxygen in the blood and describe two adaptive responses that help maintain tissue oxygen delivery.

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About This Question

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

The question covers Transport .

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