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- question: In a red blood cell entering the left atrium in a human, hyperventilation leads to a decrease in the amount of CO2 bound to hemoglobin but little or no increase in the amount of O2 bound to hemoglobin. answer should clearly state whether or not the statement is correct and then concisely explain why. the answer should be like more than three but less than 5 sentences and address all of the points in the statement. Here is an example: Both transmembrane carrier proteins and transmembrane channel proteins can mediate active transport of a hydrophilic solute through a cell plasma membrane. This statement is incorrect. Movement of a solute through a channel protein is always passive, whereas carrier-mediated transmembrane transport can be either passive or active. A transmembrane channel protein creates a pore through the membrane allowing for simple diffusion of a hydrophilic solute down a concentration gradient through the membrane. In contrast, transmembrane carrier…Question 4 Explain all the steps involved in “positive cooperativity”, enabling oxygen binding to hemoglobin.QUESTION 44 Which of the following statements is FALSE? O O O O As PCO2 increases, the affinity of hemoglobin for O2 decreases. As H+ ion concentration increases, the affinity of hemoglobin for O2 decreases. As temperature increases, the affinity of hemoglobin for O2 decreases. As 2,3-DPG increases, the affinity of hemoglobin for O2 decreases. As PO2 increases, the affinity of hemoglobin for O2 decreases. 0
- Question 7 Match the factor with its effect on the affinity of hemoglobin for oxygen. [Choose no change increased temperature decrease increase increased pH increased 2,3-DPG [ Choose ] increased PCO2 [ Choose ] increased PO2 [ Choose ]QUESTION 11 Imagine you created a form of hemoglobin that did not respond to changes in pH - its 3D structure was fixed (unchanging). Which of the following would you predict about your modified hemoglobin? O A. it would have a constant affinity for oxygen, independent of partial pressure of oxygen O B. it would have a dynamic affinity for oxygen, responding to changes in partial pressure OC. it would be less saturated with oxygen at lower partial pressures of oxygen O D. it would be more saturated with oxygen at higher partial pressures of oxygen O E. it would be unable to bind oxygenQUESTION 3 Which of the following best describes anemia? Inadequate consumption of iron Loss of blood, so that blood pressure is decreased A reduced ability of the blood to transport oxygen Having abnormally-shaped blood cells
- Predict Hb's affinity for oxygen at different conditions in the blood (in the lungs, in the tissues, pH changes, low & high oxygen levels, 2,3-BPG, fetal Hb)? I need help answering this questionQuestion 5 Match the following Sigmoidal curve Oxygen storage Contains heme Globular proteins Tetramer A. Hemoglobin B. myoglobin C. Both D. None of the choicesQuestion 3 Choose the correct answers based on the oxygen binding curves shown below for beaver hemoglobin measured at two pH values. Assume that the blood leaving the lungs of the beaver has pO2 = 100 torr and pH = 7.6. Assume that after a beaver has been busy building dams all day, the blood leaving the actively respiring muscle tissue has pO2 = 20 torr and pH = 7.2. Beaver Hemoglobin YO2 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 20 pH 7.6 40 ******* 60 p02 (torr) pH 7.2 80 100 120
- 3. Explain why the structure of myoglobin makes it function well as an oxygen-storage protein whereas the structure of hemoglobin makes it function well as an oxygen-transport protein. Discuss this in terms of the binding curve below and include the role of cooperativity in your answer. 100 80 Percent O₂ saturation 8 60 20 Working muscle 20 Resting muscle Myoglobin Hemoglobin Venous po₂ 60 40 80 Partial pressure of oxygen (pO₂, torr) Arterial po 100 120 4. What is the effect of pH on the binding of oxygen to hemoglobin (the Bohr Effect)? What happens to the percent saturation as a function of po2 graph as a result of pH change (include graph)? Why is there a pH difference in tissues versus the lungs? Briefly describe how the Bohr Effect contributes to oxygen transport to the tissues. 5. How does BPG binding to hemoglobin decrease its affinity for oxygen?What is FALSE of hemoglobin and myoglobin? O Both are proteins that can bind oxygen O Myoglobin releases more oxygen at a PO2 of 40 mm Hg than does hemoglobin Hemoglobin can bind up to four oxygen molecules, while myoglobin can bind only one O Myoglobin is in the muscle tissues O All of the above are trueAt low pO2, Myoglobin’s O2 binding affinity is ______ that of Hb. a essentially the same as b higher than c lower than