Ch 23: Animation: Gas Exchange

The total pressure of gas in the alveolar space is 100 mm Hg. The partial pressure of CO2 is 45 mm Hg. What is the maximum partial pressure of oxygen? 55 mm Hg 5 mm Hg 20 mm Hg 90 mm Hg

55 mm Hg

Carbon dioxide is created during Systemic circulation. Internal respiration. Cellular respiration. All of these.

Cellular respiration.

Mixed gases move down the pressure gradient for the whole mixture, not the pressure/concentration of each individual gas component. True False

False

Oxygen moves from the blood to the alveolar space because the PO2 in the lungs is higher. True False

False

The partial pressure of carbon dioxide in the alveolar space is higher than the partial pressure of carbon dioxide in the pulmonary capillaries. True False

False

External respiration is when gases move from the alveolar compartments to the blood. True False

True

Gas molecules move down their pressure gradient, from high to low gas pressure. True False

True

Internal respiration is the exchange of gases between the blood and the body cells. True False

True

One region with a low partial pressure for oxygen would be the alveolar space. blood leaving the heart through the aorta. actively contracting muscle tissue. all of these.

actively contracting muscle tissue.

What happens to gas exchange in a low oxygen environment? carbon dioxide may build up in the body oxygen cannot move from the alveolar space into the blood nitrogen may build up in the body all of these

oxygen cannot move from the alveolar space into the blood