(solution) The steepness of the concentration gradient across the respiratory

(solution) The steepness of the concentration gradient across the respiratory

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