Animation: Changes in the Partial Pressures of Oxygen and Carbon Dioxide View the animation below, then complete the quiz to test your knowledge of the concept.

Animation: Changes in the Partial Pressures of Oxygen and Carbon Dioxide

View the animation below, then complete the quiz to test your knowledge of the concept.
 

At the arterial ends of the pulmonary capill...

At the arterial ends of the pulmonary capillaries,

the Po₂ is higher in the capillaries than in the alveoli.

the Po₂ is lower in the capillaries than in the alveoli.

the Po₂ is equal in the capillaries and in the alveoli.

the Po₂ is higher at first in the capillaries than in the alveoli, and then it is lower in the alveoli than in the capillaries.

the Po₂ is lower at first in the capillaries than in the alveoli, and then it is higher in the alveoli than in the capillaries.

Answer

the Po₂ is lower in the capillaries than in the alveoli.

At the venous ends of the pulmonary capillaries,

the Pco₂ is higher in the capillaries than in the alveoli.

the Pco₂ is lower in the capillaries than in the alveoli.

the Pco₂ is equal in the capillaries and in the alveoli.

the Pco₂ is higher at first in the capillaries than in the alveoli, and then it is lower in the alveoli than in the capillaries.

the Pco₂ is lower at first in the capillaries than in the alveoli, and then it is higher in the alveoli than in the capillaries.

Answer

the Pco₂ is equal in the capillaries and in the alveoli.

The ranking from highest to lowest Po₂ in the area of the arterial ends of the tissue capillaries is

capillaries, tissue fluid, cells.

cells, tissue fluid, capillaries.

cells, capillaries, tissue fluid.

tissue fluid, capillaries, cells.

all three are equal.

Answer

capillaries, tissue fluid, cells.

When partial pressures for a given gas are equal between the capillaries and the tissue fluids, no net movement of that gas occurs.

True

False

Answer

True

Gasses diffuse, because of differences in partial pressures, from areas of higher pressure to areas of lower pressure.

True

False

Answer

True

The direction of gas movement is determined by

temperature.

size of the gas molecule.

solubility of the gas in blood.

partial pressure differences.

pH.

Answer

partial pressure differences.