Topics: Circulation and Excretion Quiz
What happens when carbon dioxide levels increase in the blood?
A. pH increases forcing the organisms to decrease respiration rate
B. pH decreases forcing the organism to increase respiration rate
C. the stretch receptors in the lungs cause the medulla oblongata to slow breathing
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Ammonia is the most toxic nitrogenous waste. Organisms that produce this must have access to lots of
A. oxygen
B. proteins
C. dry air
D. water