![]() ![]() This is something you should remember by heart. This is used over and over again, not just in the respiratory system you will see this in the digestive system and the urinary system. Write out the reaction shown on lecture.If your blood is acidic is more or less oxygen going to be liberated from blood given the same amount of partial pressure of O2.Would you rather have this curved as shown or you would you rather it be linear? -a straight line? Why or why not?.what would the percent O2 sat of blood be if the partial pressure of oxygen in the alveoli was 90? What would it be if the partial pressure of oxygen in your alveoli was 60, 40, 20? Are you able to easily find this information? Using your oxy-heme desaturation curve that was provide for you under resources>lectures for exam 3> "oxy-heme curve" also in your recent lab.It is impossible to have each of your hundreds of trillions of hemoglobin all 100% saturated. Remember it is physiologically impossible to have your blood truly 100% saturated with oxygen. This means that the vast majority of your gazillion hemoglobin molecules are in fact 100% saturated with oxygen (four per hemoglobin), however, this means that there are a few hemoglobin molecules that may be 75, 50, 10 or 0% saturated. If you are healthy it is around 97% saturated. What is the lesson of this? When you go into the clinic and get that pulse oximeter on your finger you get an "O2 sat" reading. Right?ģ73 oxygen molecules bound out a possible of 400 is 373/400=93.25% saturated. However they are NOT all bound to oxygen. Therefore, doing some fancy math we have a total of 400 (100X4) possible binding sites for oxygen. We have 100 hemoglobin molecules total we have 4 sights per hemoglobin molecule that can bind oxygen. What would be the overall % saturation of these 100 hemoglobin molecules. 1 hemoglobin molecule was 25% saturated ( 1 oxygen molecule was bound, leaving 3 unbound).4 hemoglobin molecules were 50% saturated ( 2 oxygen molecules were bound, leaving 2 sights unbound).16 hemoglobin molecules were 75% saturated (3 oxygen molecules were bound, leaving one sight unbound).79 hemoglobin molecules were 100% saturated (4 oxygen molecules bound to the 4 binding sites).If I had 100 hemoglobin molecules (again realize that we have hundreds of trillions of these) and I looked at each one and analyzed the amount of oxygen molecules bound to each I got these results:.How many oxygen molecules can each individual hemoglobin molecule bind to and carry? If we look at an individual hemoglobin molecule and it is bound to 4 individual oxygen molecules how saturated is it considered? How about an individual hemoglobin bound to 3 oxygen molecules, or 2 or 1 or 0?.You better know these dynamics!!! You will notice as I'm going over these slides I am giving you example questions. I've spent a lot of time describing the actions with slide 111 and 112.What is internal respiration vs external respiration? What happens to oxygen and carbon dioxide in each circumstance?.Based on slide 104 calculate the partial pressure of both oxygen and carbon dioxide if the atmospheric pressure dropped to 540mmHg.ON slide 101 there is a graphic of pulmonary volumes, either draw it and label it or simply define each of the categories of pulmonary volumes.What is the average interpleural pressure relative to the pressure in the lungs? Why is this important?.What is the difference between quiet and "forced" breathing?. ![]()
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