Because pH directly influences the _____ equilibria, PCO2 in the blood varies depends on pH. A very rough estimate of the expected PCO2 is that it will equal _____, in mm Hg. (Be able to make such an estimate.)

3000+ review questions on anatomy and physiology. 

Anatomy refers to the internal and external structures of the body and their physical relationships, whereas physiology refers to the study of the functions of those structures.