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Tme Taken:61:11.31744s Tiye Williams: LOCKDown Attempt = BrowserQuestion 9 (1 point) Which statement below is accurate? (choose the ONE best answer)in humans_ hemog...

Question

Tme Taken:61:11.31744s Tiye Williams: LOCKDown Attempt = BrowserQuestion 9 (1 point) Which statement below is accurate? (choose the ONE best answer)in humans_ hemoglobin is the major oxygen transportation moleculein humans, the copper in hemoglobin is responsible for transporting oxygenin humans, most of the oxygen in the bloodstream is found dissolved and not bound to any carrier' moleculein humans, hemoglobin can carry oxygen but not carbon dioxideanswer not listedQuestion 10 (1 point) I

Tme Taken:61:11.31 744s Tiye Williams: LOCKDown Attempt = Browser Question 9 (1 point) Which statement below is accurate? (choose the ONE best answer) in humans_ hemoglobin is the major oxygen transportation molecule in humans, the copper in hemoglobin is responsible for transporting oxygen in humans, most of the oxygen in the bloodstream is found dissolved and not bound to any carrier' molecule in humans, hemoglobin can carry oxygen but not carbon dioxide answer not listed Question 10 (1 point) In humans_ carbon dioxide (CO2) can converted to bicarbonate (HCO3-) to move through the blood stream: True False Question 11 (1 point) Blood plasma only contains red blood cells: True False



Answers

Questions $33-34$ The following questions refer to this graph that shows the rate at which relative amounts of oxygen bound to hemoglobin change as the partial pressure of oxygen changes.
Based on this graph, which of the following statements is true?
(A) At oxygen concentration 40 $\mathrm{mm}$ Hg, hemoglobin $\mathrm{A}$ is 40$\%$ saturated with oxygen, while hemoglobin $\mathrm{B}$ is at 20$\%$
(B) At oxygen concentration 60 $\mathrm{mm}$ Hg, hemoglobin $\mathrm{B}$ is 100$\%$ saturated with oxygen.
(C) Hemoglobin A becomes 100$\%$ saturated with oxygen at 60 $\mathrm{mm} \mathrm{Hg} .$
(D) Hemoglobins A and B become saturated with oxygen at the same concentration of $\mathrm{O}_{2}$ .
(E) Neither hemoglobin A nor hemogin $\mathrm{B}$ ever becomes 100$\%$ saturated with oxygen.

So this problem deals with hemoglobin and for part A. You want to find its molar mass. So you know that the chemical formula for human woman c 2952 h 4000 664 and 812 oh 832 if eight and F E for so. First, we have 2000 952 carbon atoms, each of which are 12 point no. One ground from all 4664 hydrogen atoms, each of which 1.8 graphs from Rome, 812 Nigerian Adams, 14.1 grams from all 832 auction Adams, each of which are 16 grumps more eight sulphur atoms, its atomic mass of 32 point 07 And then finally four iron atoms such as an atomic mass of 55 0.85 So when you add all these together, we get that are mullah mass of hemoglobin 6.5 32 times 10 to the four grams Promote now for part B For part B. We want to find the mass of hemoglobin and every human adult, and so were given a couple of youthful numbers for to solving this problem. So we know that every human has five point of leaders of blood and that in every mill later blood, we have 5.4 times 10 to the nine red blood cells. So permanent leader, and then finally, we have two point eight times tend to the eight hemoglobin molecules, chemo molecules for every one red blood cell. So those are gonna be are useful conversions when we're gonna find the final answer. So we know that every human that we're gonna start with has five point leaders of blood and you're to convert this to middle leaders, so we just multiply by 1000. This is where our first number comes because we know that for every middle leader blood But there are 5.0, terms tend to the nine red blood cells. And then our second conversion comes in, you know, they're 2.8 times 10 38 hemoglobin molecules for everyone. Red blood cell. The next up we need to do is we convert this two moles of hemoglobin because right now we have molecules of human woman so well, just divide by Abu Godric's number, just six point over two times 10 to 23. You know that that's how many molecules you are in one more of any substance, and I would get moles of hemoglobin. And finally we just multiply by the more massive hemoglobin that we calculated per a just 6.532 times 10 to the four grams for every one more. I'm hemoglobin and in the most play all that out. You will get that the molar mass or not, the molar mass, but the total mass of hemoglobin and every human adult. There's 7.6 times intentionally two grams. That is a final answer.

All right. So Problem 34 is asking us to analyze a graph showing two different hemoglobin saturation levels and environments of different partial pressure of oxygen. So the best way to approach these kinds of problems is to use process of elimination, comparing the statements given and the information that graph is giving you. So First, let's see what the graph is telling us. So looking at the differences between the curves, we can see that you live in a has an increase of saturation with oxygen and environment. If a lower concentration on oxygen with hemoglobin be so since you know love in a can start picking up oxygen even though there isn't that much of it around, that means that human were but a has a higher of maybe for oxygen, and he loved be meaning that it can pick it up easier. We can also support this by seeing the human love and be needs to be in an environment of higher oxygen to be just a saturated as hemoglobin. A. So let's look up the answer choices and see what we can. Let me just remove these lines over here. All right, so option a says that human woman be has a greater affinity for auction. We just concluded a hemoglobin A has a greater affinity, so we know that we can eliminate that option. B says the hemoglobin be would drop off oxygen at body cells easier than him will be OK. Now we know that body cells our environment of lower concentrations of 02 So looking at this lower region, hemoglobin be lets go of oxygen earlier than he reliving a. So since hemoglobin had B has the lower affinity, that means I shouldn't be with left Gobert's oxygen easier than hemoglobin. A. So option B What's forth? This graph. But let's go to the rest of the options to make sure that we're right. So Options C says I shouldn't be can pick up oxygen in the lungs easier than hemoglobin, a well loves air high in oxygen concentration. So that means this region over here. And so the human woman, with the greater affinity of auction, would pick auction off the easiest in this region. So since you don't live in a gets saturated with 02 earlier than he would be, this means that Option C is wrong. So option D now says that hemoglobin A is identical in structure but different function to hear a woman being well. If there are differences in the affinities, this means that there's something in the structure of the hemoglobin that's making one grab onto oxygen more than the other. Also, their functions out to deliver oxygen. So we can't say that they have to run functions so we can eliminate this option option E says Hemoglobin A as found in adults, while Chemical B is found in fetuses and new boards that for this option you have to already know that fetal human WILBON has a higher demand for oxygen than adult hemoglobin. And since we concluded the hemoglobin A has a higher affinity, it's more likely that hemoglobin a would be he fetal hemoglobin. So we can confidently conclude that because he is also wrong, that the correct answer is B

Okay. More to answer this question, we have to talk about the lungs mechanics. Okay. 1st remember that if this is the tractors bronchitis in your gloves in order for you to breathe or for here to cash inside of your respiratory airways in the pressure in the atmosphere has to be greater than the pressure here in the lungs. Okay. Because I remember that of the oxygen or air is going to move from higher concentrations too noble concentration. So in order for a year to machine at the end of the pressure has to be greater than pressure inside of the lungs. Okay. Also in order to control ventilation or respiration. Okay, it means remember that that normal respiratory rate wages from 16- 20 breaths per minute. They wouldn't when we have central chemo receptors and very feral. Okay. The central uh central located in the medulla while the preferred communicators are located in the karate body and also in the aortic arch. Okay, those and the locations of that prepared in the center. Two more receptors in the central human receptors are more sensitive to changes in carbon dioxide who are while the peripheral demolition costs more sensitive to changes in oxygen pressure. Okay, so also remember that in if this is normal bureaus. Okay the bureau's when we inhale it is going to expand, going to become bigger. Okay. The stress when we can feel and when we exhale after killing he's going to at all to its normal shape practically the purely abiola is never going to get like this ladies, they collapse it. Why? Because there is something here called surfactant. Okay, normally and I'll be like without so frightened here it is going to be a pretty sure potential. Okay, that is going to attract this side to this side in the same here doesn't here, he's going to be a service station. Okay, so in order to prevent this Some sense besides type two, I want to produce a surfactant. The the surfactant is going to prevent this. So, if it is going to decrease the sophistication, in other words, okay, In order to prevent length or I'll be like collapsing, okay, because you are Viola is going to be collapsed, it is going to be like this. For example, imagine money this is collapsed. It is like a like a balloon. Try to stick your balloon with water ending, try to to deflate it and then deflate it. And you will see that the two sides decide and decide are going to be very stick together because of that engine. Okay, So it is going to be very hard to separate on this side from this side. So this is why we have to prevent albion like collapsing. And this is why we have surface tension. Okay, so the city answers now. The options option A says that during inhalation as as atmospheric pressure exists in the space between the land and that's what African world. And this is true because if this is your lung initial story, your chest wall between the thrusting world into the lands, there is some space that is called the pleural space. So when we inhale this is going to expand the chest and also the answer going to span. So there is going to be a super very pressure here in this space that you're in spain. So this is true. We're looking for the false remember option B says that smoking one cigarette kind mobilized as the cilia lining their airways for hours. And this is true in our you know, we're eight ways that our respiratory airways is situated because Syria great here and they're allowed to move secretions out of the world history. Howard airways, okay. We smoke. We can particularly they paralyze or immobilized those syria and is going to to let us let our airways without protection for many hours. Okay, so, uh, option be easy Two. No option C optional CCs The respiratory control center in the medulla in the central command center responds more strongly to changes in arterial oxygen concentration than to changes in materials. She to convince confrontation. And this is false because as I already told you central committee sectors respond more strongly to carbon dioxide and note to oxygen. So I hope so. See Yes, false. And this is the answer. Let's see option. The option. This is that without surfactant the work of breathing is greatly increase. And this is correct because if if there is not so important, then this is going to happen in order to separate these sides of the album is going to be the ones particularly you can be very hard. So she is true Ocean E says the diaphragm contracts during installation and we'll access for an explanation. That this is also okay. If this is for one of the lungs here, you're going to have that I get from when you in hell the lands are going to expand. Okay, the lines are going to spend like this. So your diaphragm is going to contract in order two. A low inflation inspiration. Okay, because because the answer expanding, particularly when you fail, your legs are too, it is great. Again, integral diaphragm is going to is going to relax. It's going to move upwards. Remember that inspiration is an active movement because the different is contracting while expiration or exhalation. It is a passive movement is a passive process because the diaphragm is just relaxing. Okay, so the answer for this question is officer. We shall see


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