Term
| What is the total amount of CO2 that is excreted by a person? |
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Definition
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Term
What is the partial pressure of CO2 in the tissues?
What is the partial pressure of CO2 in mixed venous blood?
What is alveolar partial pressure of CO2? |
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Definition
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Term
| What are the 3 principle ways that CO2 is carried in the blood? |
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Definition
Dissolved CO2
Bicarbonate
Carbamino |
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Term
| How much CO2 is dissolved in blood? |
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Definition
| Each 100 ml of mixed venous blood carries 2.7 ml of CO2 |
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Term
What is the largest carrier of CO2 in the blood?
What enzyme catalyzes the creation of bicarbonate?
What is the equation of the reaction? |
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Definition
Bicarbonate
Carbonic Anhydrase
CO2 + H2O <-> H2CO3 <-> HCO3- + H+ |
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Term
| T/F: The Carbon Dioxide equilibrium curve is sigmoidal in shape. |
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Definition
| False. It is curvilinear, reflecting the lack of allosteric cooperativity. This shows how there are large content changes with small pressure changes. |
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Term
| What is the Hamburger shift? |
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Definition
| Movement of HCO3- out the cell comes at a cost of moving Cl- into of the cell. |
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Term
| What is the Haldane effect? |
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Definition
| The binding of CO2 to Hb leads to a decreased affinity of Hb for O2 and thus greater unloading. This is a physiological phenomenon that helps perfusion of tissues during CO2 production. |
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Term
| What is the net effect of the reactions that take place at the alveolar interface? |
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Definition
| Liberation of CO2 from bicarbonate and proteins for excretion into the lungs. |
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