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37 votes
37 votes
Oxygen diffuses into the bloodstream from the

alveoli because of:
an increased heart rate.
a difference in concentration of oxygen.
an increased breathing rate.
O a difference in concentration of plasma.

User Lily Ballard
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2 Answers

17 votes
17 votes
Increased breathing rate !
User Dino Sunny
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8 votes
8 votes

B: a difference in concentration of oxygen.

User Diegog
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