quiz_4 - which O 2 diffuses from air to blood 2[2 pts...

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Name_____________________________  BIOLOGY 325H QUIZ 4  [5 pts] _____________________________________________________________ 1.  [2 pts]  Congestive heart failure leads to condition known as 'pulmonary edema' which makes the  process of respiration less efficient. Pulmonary edema refers to a buildup of interstitial fluid  between the epithelium of the alveolus and the pulmonary capillaries surrounding it. In Fick's  Law   of   Diffusion,   which   variable(s)   are   altered   by   this   buildup   and   why   does   that   affect  respiration?   In pulmonary edema there is an increase in the distance  O 2  must diffuse in order to pass from the air  in the alveolus to the blood inside a capillary. This is the variable 'L' in Fick's equation. The rate of diffusion is inversely proportional to distance, so pulmonary edema reduces the rate at 
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Unformatted text preview: which O 2 diffuses from air to blood. 2. [2 pts] Briefly describe capillary effusion. NOTE: I am not asking you to explain why it occurs, but simply to describe what it is. Capillary effusion refers to the bulk flow of water and its dissolved solutes (including O 2 , CO 2 , and nutrients) between the blood and the interstitial fluid of a capillary bed. Water and solutes flow out of the blood into the interstitial fluid at the arteriole end of the capillaries, and flow from the interstitial fluid back into the blood at the venule end of the capillaries. 3. [1 pt] In a mammal, what is the name of the vessel that returns oxygenated blood from the lung to the left atrium of the heart? Name_____________________________ pulmonary vein...
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quiz_4 - which O 2 diffuses from air to blood 2[2 pts...

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