Ijmb Model Questions Vol1 2017 Biology Question 4

Practice essay / theory question 4 from the 2017 Ijmb Model Questions Vol1 Biology examination. This question covers respiration, human anatomy .

Ijmb Model Questions Vol1 2017 Biology Essay / Theory

Topics: respiration human anatomy

Question 4 IJMB_MODEL_QUESTIONS_VOL1 • 2017 • BIOLOGY • essay

The diagram shows the major structures of the human respiratory system.

Question Parts

( a )

Describe, in the correct order, the pathway that a breath of air follows from the external environment to the site where gas exchange with the blood occurs. State each structure the air passes through.

( b )

Explain the physiological mechanism that enables oxygen to move from the alveolar air into the blood. Include the role of partial pressure gradients and the structure of the alveolar‑capillary membrane.

( c )

During inspiration the diaphragm contracts downwards. Using the diagram, explain how this change in thoracic volume leads to airflow into the lungs, referring to Boyle’s law.

( d )

Compare external respiration with internal respiration, highlighting differences in location, the gases involved, and the direction of diffusion.

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About This Question

This is Ijmb Model Questions Vol1 2017 Biology Question 4. It is one of the essay questions from the 2017 Ijmb Model Questions Vol1 Biology examination.

The question covers respiration, human anatomy .

View More Ijmb Model Questions Vol1 2017 Biology Questions More Ijmb Model Questions Vol1 Practice Questions Back to Questions

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