Metabolism, Nutrition, and Body Temperature/Body Fluids

Hi to please answer the following questions:DQ 1
3 types of macromolecules which are carbohydrates, fats, and proteins.  please, describe all 3 macromolecules.
DQ 2
What is pH? How do the respiratory and urinary systems regulate pH?
Please use “3” APA format referencesto also use the book Memmler’s The Human Body in Health and Disease, by Barbara Janson Cohen and Kerry L. Hull 13th edition. 

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