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Imagine that you breathe in oxygen and it binds to hemoglobin in your blood to form $\left[\mathrm{O}_{2} \text { : hemoglobin]. }\right.$a. Write a balanced equation for the process.b. The $\left[\mathrm{O}_{2} : \text { hemoglobin }\right]$ delivers oxygen to your cells. Describe this process.c. Provide evidence that this process is reversible.
(a) Given condition: Imagine that you breathe in oxygen and it binds to hemoglobin in your blood to form [O2: hemoglobin].Hemoglobin is a red pigment in the blood that is responsible for gas transport.Balanced equation for the given reaction is,Hemoglobin + O2 ---------> [Hemoglobin:O2](b) Given condition: The [O2:hemoglobin] delivers oxygen to your cells. Transport of gases depends on the partial pressure of gases. For example, Partial pressure of oxygen is more in the environment than at the tissues. So, [Hb-O2] is formed in the lungs and O2 is released at the tissues.(c) Transport of gases by hemoglobin (Hb) is a reversible process.At the lungs, O2 partial pressure is more, so Hb associates to form Hb-O2Hb + O2 ------> Hb-O2At the tissues, O2 partial pressure is lesser than partial pressure of CO2. So, CO2 replaces O2 in the Hb.Hb-O2 + CO2 --------> Hb-CO2 + O2At the lungs, O2 replaces CO2.Hb-CO2 + O2 --------> Hb-O2 + CO2
Chemistry 102
Chemistry 101
Chapter 23
Chemical Equilibrium
Section 2
Reversible Processes
Chemical reactions and Stoichiometry
University of Maryland - University College
Brown University
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Yeah, Hi there. Let's talk about oxygen and hemoglobin and the reversible reaction that occurs there. Um, so you breathe in air and, of course, that goes through your lungs and in your lungs. There is quite a bit of oxygen that oxygen binds to the hemoglobin. Since there's lots of oxygen in your lungs, the oxygen goes ahead and binds to the heat of hemoglobin, and it forms this complex where it shows theocracy gin bonded to the receptor on the hemoglobin. So the hemoglobin has receptors, and that's where the oxygen binds. This occurs in the environment when there is lots of oxygen, in other words, in the lungs, and then So this is our reaction. Let's talk about what happens once the hemoglobin travels to other tissues and cells in your body. When that hemoglobin travels to other tissues and cells in your body, there is a much lower concentration of oxygen there, so the oxygen is released from the hemoglobin so that it can go to yourselves So the oxygen is released to yourselves, where is then used for cellular respiration. So this reaction is reversible. Evidence that this is reversible is the fact that the hemoglobin works at all. The fact that the hemoglobin can pick up okay can pick up oxygen in the lungs. Okay, according to our forward reaction there in part A. So it becomes the complex. And then the hemoglobin, with the oxygen attached to it, travels through through the blood to your cells, and the oxygen is then released. So that is the reverse reaction. Thank you. Yeah. The fact that we are all alive and breathing is evidence that this was going on. Hemoglobin binding to the oxygen in the lungs, going through the bloodstream to different cells and tissues. In the body where there is a lower oxygen content and the reaction of the process reversing itself and the oxygen and hemoglobin separating so that the oxygen could go to the cells, the hemoglobin will then cycle back to the lungs and pick up more oxygen.
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