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Question 6 3 / 3 points How many molecules of oxygen can one molecule of hemoglobin carry? AL, 0OWN W Hide question 6 feedback Good work; your answer is correct! Question 7 3 / 3 points Which of the following are some of the functions of the respiratory system? Helps to maintain acid-base balance Provides oxygen to body tissues and removes waste such as CO2 Helps in sensing odors Helps in the production of speech o All of the above W Hide question 7 feedback Good work; your answer is correct!