A biology professor (Bill) and a physics professor (Joe) met in the large lecture hall between their classes. Bill said to Joe, “You physicists teach pressure all wrong. I asked my students what they thought pressure was. Someone said ‘Force divided by area.’ I said, ‘No! In biology pressure is just concentration – partial pressure.’” Joe grabbed Bill's wrist and took his pulse, saying, “This is biology too.” Which perspective on pressure do you think is most useful for a biologist, partial pressure (á la Bill) or force per unit area (á la Joe)? Discuss and give an example from biology to illustrate your conclusion. Note: This is an essay question. Your answer will be judged not solely on its correctness, but for its depth, coherence, and clarity.
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