1. CARDIOVASCULAR SYSTEM Gas Exchange Group 6

2. GAS EXCHANGE Gas exchange occurs in the lungs in the alveoli The alveoli are tiny sacs in the lungs that are extremely thin, allowing for rapid gas exchange Oxygen and Carbon dioxide diffuse from the lungs into red blood cells http://highered.mcgraw- hill.com/sites/0072495855/student_view0/chapter 25/animation__gas_exchange_during_respiration. html

3. THE DIRECTION OF GAS MOVEMENT IS DETERMINED BY… A. Temperature B. Size of gas molecule C. Solubility of gas in blood D. Partial pressure differences E. pH

4. WHICH OF THE FOLLOWING STATEMENTS ABOUT PARTIAL PRESSURES OF GASES IS TRUE? A. P O2 in lung is greater than P O2 in blood ; P CO2 in lung is greater than P CO2 in blood B. P O2 in lung is greater than P O2 in blood ; P CO2 in lung is less than P CO2 in blood C. P O2 in lung is greater than P O2 in blood ; P CO2 in lung = P CO2 in blood D. P O2 in lung is less than P O2 in blood ; P CO2 in lung is less than P CO2 in blood E. P O2 in lung is less than P O2 in blood ; P CO2 in lung is greater than P CO2 in blood

5. WHICH OF THE FOLLOWING STATEMENTS ABOUT PARTIAL PRESSURES OF GASES IS TRUE? A. P O2 in blood is greater than P O2 in tissues ; P CO2 in blood is greater than P CO2 in tissues B. P O2 in blood is greater than P O2 in tissues ; P CO2 in blood is less than P CO2 in tissues C. P O2 in blood is greater than P O2 in tissues ; P CO2 in blood = P CO2 in tissues D. P O2 in blood is less than P O2 in tissues ; P CO2 in blood is less than P CO2 in tissues E. P O2 in blood is less than P O2 in tissues ; P CO2 in blood is greater than P CO2 in tissues

6. REFERENCES O'Loughlin, McKinley. "Animation: Gas Exchange during respiration." Human Anatomy. 2006. Web. 10 Nov 2009..