Hemoglobin may increase in animals as a result of
A) seasonal changes.
B) locomotory activity.
C) anemia.
D) all of these.
E) none of these.
Correct Answer:
Verified
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
Q23: As inspiration begins, the intra-alveolar pressure is
A)
Q24: The intrapleural pressure
A) falls before inspiration.
B) falls
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
Q29: Thickness of the barriers separating the air
Q30: Five different respiratory pigments can be found
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