Which of the following statements about pleural fluid is false?
a. Fluid can move easily between each he-mithorax.
b. Normal protein concentration is between 1.3 and 1.4 g/dl.
c. The total volume is approximately 16 ml.
d. Total protein concentration is similar to that of interstitial fluid elsewhere in the body.
ANS: A
The average person has approximately 8 ml of pleural fluid per hemithorax. It is estimated that this pleural fluid has a total protein concentration similar to that of interstitial fluid elsewhere in the body: between 1.3 and 1.4 g/dl. In human beings, the pleural spaces surrounding each lung are completely independent, being separated by the mediastinum.
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