Part Three: Acid/Base Homeostasis in the HumanBody
Beginning Questions:
Carbon dioxide is formed during cellular respiration andthen diffuses out of cells into the interstitial fluid and theninto the bloodstream. Most of the carbon dioxide is transported inour blood as bicarbonate. Write the chemical equation for theformation of bicarbonate and hydrogen ions from carbon dioxide andwater below.
Under which of the following situations would theformation of bicarbonate and hydrogen ions be greater? Circle youranswer.
At Rest After Exercise
Change in pH after exercise.
Calculate the percentage change in pH for bothprocedures and record your values in the table below
Condition: | Breaths/Min | Control pH | Experimental pH | % pH Change | Class Avg of % pH Change |
At Rest | 13 | 6.8 | 6.2 | 8.8% | 9.2% |
After Exercise | 34 | 7.1 | 5.8 | 18.3% | 15.6% |
Questions:
Explain how blowing air into water caused the change inpH.
Describe why exercise caused the observed change inpH.
