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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 Beach Boys
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2 Answers

2 votes
Increased breathing rate !
User Mxstbr
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2 votes

B: a difference in concentration of oxygen.

User Cryckx
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