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Animation: Gas Exchange During Respiration
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View the animation below, then complete the quiz to test your knowledge of the concept.






1The direction of gas movement is determined by
A)temperature.
B)size of the gas molecule.
C)solubility of the gas in blood.
D)partial pressure differences.
E)pH.



2Which of the following statements about partial pressures of gases is TRUE?
A)PO2 in lung is greater than PO2 in blood ; PCO2 in lung is greater than PCO2 in blood
B)PO2 in lung is greater than PO2 in blood ; PCO2 in lung is less than PCO2 in blood
C)PO2 in lung is greater than PO2 in blood ; PCO2 in lung = PCO2 in blood
D)PO2 in lung is less than PO2 in blood ; PCO2 in lung is less than PCO2 in blood
E)PO2 in lung is less than PO2 in blood ; PCO2 in lung is greater than PCO2 in blood



3Which of the following statements about partial pressures of gases is TRUE?
A)PO2 in blood is greater than PO2 in tissues ; PCO2 in blood is greater than PCO2 in tissues
B)PO2 in blood is greater than PO2 in tissues ; PCO2 in blood is less than PCO2 in tissues
C)PO2 in blood is greater than PO2 in tissues ; PCO2 in blood = PCO2 in tissues
D)PO2 in blood is less than PO2 in tissues ; PCO2 in blood is less than PCO2 in tissues
E)PO2 in blood is less than PO2 in tissues ; PCO2 in blood is greater than PCO2 in tissues



4Oxygen-rich blood is carried through pulmonary arteries from the lungs to the heart.
A)True
B)False



5Oxygen-poor blood is carried through systemic veins from the body tissues back to the heart.
A)True
B)False







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