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1-11-10-%20Gas%20Exchange%20Worksheet%201 - BSC2011 SI...

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BSC2011 SI: 1/11/10 Worksheet 1—Gas Exchange Examples of respiratory organs used by different organisms for gas exchange: 1. 2. 3. Important characteristics of gas exchanging organs: 1. Large, surface area - Purpose: - Proble m: 2. Thin epithelial m e m br an e - Purpose: - Proble m: 3. Moist - Purpose: - Proble m: 4. Highly vascularized (m e aning ________________________________)and p erfuse (m e aning _________________________________) - Purpose: - Proble m: Oxygen Uptake: - Water cont ains __________________ m ore oxygen than air. - (Terrestrial/Aquatic) g as exchang e is m et abolically expensive. - Solutions: 1. _____________________________- us ed by m a ny aqu atic organisms. Opposite of tidal ventilation, which is us ed by m a ny terrestrial anim als.
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BSC2011 SI: 1/11/10 2. ____________________________- used by sharks and tuna. How does it work? 3. Counter current exchange- water flows in ______________________ direction of blood. Carbon Dioxide Excretion: - Carbon Dioxide is (more/less) soluble in water than in air. - ___________________________- a fall in blood pH. A condition that may occur due to   weak carbon dioxide excretion because _________________________ ions form.
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