Include 2 references for each question. Your post should be at least 250 words w
Include 2 references for each question. Your post should be at least 250 words with two  references in APA format. Discussion 1 Your textbook mentions 3 types of macromolecules which are carbohydrates, fats, and proteins. Please, describe all 3 macromolecules. Discussion 2 What is pH? How do the respiratory and urinary systems regulate pH?

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