Expert answer:The steepness of the concentration gradient across

  

Solved by a verified expert:lThe steepness of the concentration gradient across the respiratory membrane affects gas exchange, with a steeper gradient ____.a.decreasing the rate of exchangeb.decreasing the levels of carbon dioxide in the blood onlyc.increasing the rate of exchanged.increasing the number of red blood cellse.increasing the levels of hemoglobin-bound oxygen only

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