Answers Q5 Biology 2014 The Endocrine and Exocrine Systems — Unit testQuestion 2

2

QuizMultiple Choice

The Endocrine and Exocrine Systems — Unit test

Question 2 • Q5 Biology 2014

Veins take blood back to the heart. Which gas would be most abundant in a vein that takes blood from muscle cells in the arm back to the heart?

Answer

A

carbon dioxide

B

oxygen

C

nitrogen

D

hydrogen

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