Gce Model Questions Vol1 2018 Biology Question 1

Practice objective / multiple choice question 1 from the 2018 Gce Model Questions Vol1 Biology examination.

Gce Model Questions Vol1 2018 Biology Objective / Multiple Choice Medium Difficulty
Question 1 GCE_MODEL_QUESTIONS_VOL1 • 2018 • BIOLOGY • objective

At sea level the barometric pressure is 760 mm Hg. A climber ascends to a altitude where the barometric pressure is 640 mm Hg. The fraction of oxygen in dry air is 0.21 and the water vapour pressure in the alveoli is 47 mm Hg. Using the alveolar gas equation \(PAO_2 = F_{iO_2}(P_b - P_{H_2O}) - \frac{P_{aCO_2}}{R}\) with \(P_{aCO_2}=40\) mm Hg and respiratory quotient \(R=0.8\), calculate the alveolar partial pressure of oxygen \(PAO_2\) (in mm Hg).

Answer Options

A. 81.0 mm Hg (approximately)
B. 68.2 mm Hg (approximately)
Correct Answer C. 74.5 mm Hg (approximately)
D. 95.3 mm Hg (approximately)
Correct Answer
C
Correct Option:
74.5 mm Hg (approximately)

About This Question

This is Gce Model Questions Vol1 2018 Biology Question 1. It is one of the objective questions from the 2018 Gce Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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