During exercise, the __________ use oxygen faster, so the _________ have to work harder. A. lungs, muscles B. muscles, lungs C. muscles, glucose D. glucose, lungs

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asked Mar 27, 2019 49.9k views

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During exercise, the __________ use oxygen faster, so the _________ have to work harder.

A. lungs, muscles
B. muscles, lungs
C. muscles, glucose
D. glucose, lungs

Biology
middle-school

Dalal asked

by Dalal

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1 Answer

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A as the lungs take in oxygen and give it carbon dioxide

Jnd answered Apr 1, 2019

by Jnd

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