Neco 2020 Biology Question 4

Practice essay / theory question 4 from the 2020 Neco Biology examination. This question covers respiration, human anatomy .

Neco 2020 Biology Essay / Theory

Topics: respiration human anatomy

Question 4 NECO • 2020 • BIOLOGY • essay

The diagram shows the human respiratory system with its major structures labelled.

Question Parts

( a )

Describe the complete pathway that air follows from the external environment to the site of gas exchange, naming each structure it passes through.

( b )

Explain how the structural features of the alveoli enable efficient gas exchange.

( c )

During quiet breathing the diaphragm contracts and moves downward. Using the diagram, explain how this movement alters the volume of the thoracic cavity and the pressure changes that result in airflow into the lungs.

( d )

A patient suffers from chronic obstructive pulmonary disease (COPD). Based on the diagram, discuss two structural changes that occur in the respiratory system in COPD and how these changes impair ventilation.

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About This Question

This is Neco 2020 Biology Question 4. It is one of the essay questions from the 2020 Neco Biology examination.

The question covers respiration, human anatomy .

View More Neco 2020 Biology Questions More Neco Practice Questions Back to Questions

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