As inspiration begins, the intra-alveolar pressure is
A) higher than the atmospheric pressure.
B) lower than the atmospheric pressure.
C) the same as the atmospheric pressure.
D) higher than internal pressure.
E) none of these.
Correct Answer:
Verified
Q18: Respiration in birds differs from mammals in
Q19: Thoracic wall and lungs remain in close
Q20: In birds, one breathing cycle is made
Q21: During inspiration in mammals the
A) external intercostal
Q22: During passive expiration
A) diaphragm relaxes.
B) external intercostal
Q24: The intrapleural pressure
A) falls before inspiration.
B) falls
Q25: Hemoglobin may increase in animals as a
Q26: Pulmonary ventilation is the product of
A) residual
Q27: Too little alveolus ventilation in comparison to
Q28: Decrease in alveolar oxygen concentration causes
A) vasoconstriction
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