Neco Model Questions Vol1 2019 Biology Question 3
Practice objective / multiple choice question 3 from the 2019 Neco Model Questions Vol1 Biology examination.
The diagram shows the human respiratory system with labelled parts: nasal cavity (NC), pharynx (PH), larynx (LA), trachea (TR), bronchi (BR), bronchioles (BO), alveoli (AL) and diaphragm (DI). Identify the structure that is the primary site of gas exchange. Assuming the total lung volume is 6 L and alveoli occupy 74 % of this volume, and that the lung contains approximately \(4.8 \times 10^{8}\) alveoli of equal size, calculate the total internal surface area of the alveoli (in square metres) available for diffusion. (Treat each alveolus as a sphere.)
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About This Question
This is Neco Model Questions Vol1 2019 Biology Question 3. It is one of the objective questions from the 2019 Neco Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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