Waec Model Questions Vol1 2018 Biology Question 4

Practice essay / theory question 4 from the 2018 Waec Model Questions Vol1 Biology examination. This question covers Respiration, Human anatomy, Physiology .

Waec Model Questions Vol1 2018 Biology Essay / Theory
Topics: Respiration Human anatomy Physiology
Question 4 WAEC_MODEL_QUESTIONS_VOL1 • 2018 • BIOLOGY • essay
Waec Model Questions Vol1 2018 Biology Question 4 diagram

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

Question Parts

( a )
Describe the complete pathway that air follows from the external environment to the alveoli, naming each structure shown in the diagram.
( b )
Explain the mechanism of gas exchange at the alveolar‑capillary membrane, including the role of partial pressure gradients of oxygen and carbon dioxide.
( c )
A resting adult has a tidal volume of 500 mL and a respiratory rate of 12 breaths per minute. (i) Calculate the minute ventilation. (ii) Discuss two physiological factors that would increase minute ventilation during moderate exercise.
( d )
The diagram indicates a defect in the diaphragm. Explain how a paralysed diaphragm would affect ventilation and name one clinical condition in which this defect is commonly observed.

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About This Question

This is Waec Model Questions Vol1 2018 Biology Question 4. It is one of the essay questions from the 2018 Waec Model Questions Vol1 Biology examination.

The question covers Respiration, Human anatomy, Physiology .

View More Waec Model Questions Vol1 2018 Biology Questions More Waec Model Questions Vol1 Practice Questions Back to Questions

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