Campbell Biology, Books a la Carte Plus Mastering Biology with eText -- Access Card Package (10th Edition)
10th Edition
ISBN: 9780133922851
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 42, Problem 12TYU
WRITE ABOUT A THEME: INTERACTIONS Some athletes prepare for competition at sea level by sleeping in a tent in which PO2 is kept low. When climbing high peaks, some mountaineers breathe from bottles of pure O2. In a short essay (100-150 words), relate these behaviors to the mechanism of O2 transport in the human body and to physiological interactions with our gaseous environment.
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Recall from your BI110 class that metabolically active tissues produce CO2 as a by-product of cellular respiration. Those metabolically active tissues require the O2 that is brought by hemoglobin for the same process (cellular respiration). Explain why the effect of pH on hemoglobin’s affinity for oxygen is consistent with delivering it to actively metabolizing tissues. (Hint: think about what effect the presence of CO2 has on the tissues…)
If there were little to no Chloride in the blood, what would happen to CO2 transport and why?
Select one:
O a. CO2 transport would not change because chloride is not part of the carbonic anhydrase reaction
O b. CO2 transport would decline because H+ would not be able to bind to hemoglobin
O c. CO2 transport would decline because HCO3 wouldn't be able to exit the red blood cell thus inhibiting the carbonic anhydrase
reaction
O d. CO2 transport would increase because HCO3 would be able to exit the red blood cell more freely
Create a labeled diagram explaining how CO2 moves from cells of the working tissue as HCO3 - in the blood (do not include other ways CO2 moves through the blood). Be sure to include the carbonic anhydrase inside red blood cells and the HCO3 - /Cl- exchanger in your diagram. Write an explanation for your diagram.
Chapter 42 Solutions
Campbell Biology, Books a la Carte Plus Mastering Biology with eText -- Access Card Package (10th Edition)
Ch. 42.1 - Prob. 1CCCh. 42.1 - Three-chambered hearts with incomplete septa were...Ch. 42.1 - Prob. 3CCCh. 42.2 - Explain why blood has a higher 02 concentration in...Ch. 42.2 - Prob. 2CCCh. 42.2 - Prob. 3CCCh. 42.3 - Prob. 1CCCh. 42.3 - Prob. 2CCCh. 42.3 - Prob. 3CCCh. 42.4 - Explain why a physician might order a white cell...
Ch. 42.4 - Prob. 2CCCh. 42.4 - Prob. 3CCCh. 42.4 - Prob. 4CCCh. 42.4 - Prob. 5CCCh. 42.5 - Why is an internal location for gas exchange...Ch. 42.5 - Prob. 2CCCh. 42.5 - MAKE CONNECTIONS Describe similarities in the...Ch. 42.6 - Prob. 1CCCh. 42.6 - Prob. 2CCCh. 42.6 - Prob. 3CCCh. 42.7 - Prob. 1CCCh. 42.7 - How does the Bohr shift help deliver O2 to very...Ch. 42.7 - Prob. 3CCCh. 42 - How does the flow of a fluid in a closed...Ch. 42 - Prob. 42.2CRCh. 42 - Prob. 42.3CRCh. 42 - Prob. 42.4CRCh. 42 - Prob. 42.5CRCh. 42 - How does air in the lungs differ from the fresh...Ch. 42 - How are the roles of a respiratory pigment and an...Ch. 42 - Prob. 1TYUCh. 42 - Blood returning to the mammalian heart in a...Ch. 42 - Prob. 3TYUCh. 42 - When you hold your breath, which of the following...Ch. 42 - Prob. 5TYUCh. 42 - Prob. 6TYUCh. 42 - Prob. 7TYUCh. 42 - DRAW IT Plot blood pressure against time for one...Ch. 42 - EVOLUTION CONNECTION One opponent of the movie...Ch. 42 - Prob. 10TYUCh. 42 - Prob. 11TYUCh. 42 - WRITE ABOUT A THEME: INTERACTIONS Some athletes...Ch. 42 - Prob. 13TYU
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- Below are multiple oxygen binding affinity curves for hemoglobin. The affinity curve for normal hemoglobin in blood is represented by curve "D," at a pH of 7.2 and at a concentration of 5mM BPG and 26 mM CO2. O₂ saturation (%) 100 Answer 1: B Answer 2: [Select] Answer 3: B Answer 4: 80 A 60 1. How would changes to acidity, BPG concentration and CO₂ levels affect the binding affinity curve and p50? lower than Answer 5: E 40 1. BPG concentration is decreased to 3mM: The binding affinity curve would look like B. The p50 would be lower than normal (D). 2. pH is increased to 7.6: The binding affinity curve would look like B. The p50 would be [Select] normal (D). 20 3. CO₂ concentration is increased to 30 mM: The binding affinity curve would look like. [Select] The p50 would be Answer 6: 0 normal (D). II. The hemoglobin has been treated with a denaturing solution which disrupts quaternary structure only, and has a binding affinity resembling myoglobin. The binding affinity curve would look…arrow_forwardIn addition to O2 binding, changes in other chemical conditions can result in changes in hemoglobin structure and function. Increases in blood H+ result in oxygen binding curves for hemoglobin that are shifted to the right. The effect of H+ can be understood in terms of the equilibrium:H-Hb+ + O2 → Hb-O2 + H+How does the difference in pH in the lungs and tissues help hemoglobin do its job of delivering oxygen? Use the equilibrium equation in your argument.arrow_forward1) Construct a figure that shows how most molecules of CO2 gas is stored in the blood. 2) For each of the steps in your figure above: Describe what is happening in a sentence. 3) Answer the following in a brief sentece: Why does the body store CO2 this way instead of just transporting the gas dissolved in a liquid.arrow_forward
- Fill in the blanks using the word bank to describe 02 and CO2 transport in the respiratory system. Words CAN be used more than once. Enhance(s) Reduced Hemoglobin Diffusion Carbaminohemoglobin will 02/CO2 Transport Inhibit Increase Chloride Shift Carbonic Acid Oxygen is transported from the Tissues Decrease oxygen. Plasma Carbonic Anhydrase to the in one of two ways: by binding to hemoglobin, creating. (HbO2), or by dissolving in plasma. Since oxygen has poor solubility in water, most oxygen molecules are transported via As oxygen leaves the lungs and enters the red blood cells, it binds to a hemoglobin (HHb) molecule which consequently forms Oxyhemoglobin (HbO2) and releases a hydrogen ion (H+), which will pH. An increase in H+ the unloading of oxygen from the blood to the Lungs Oxyhemoglobin Red Blood Cell(s) Bicarbonate to the (HbCO2), or as Carbon dioxide is transported from the dissolved in plasma, binding to hemoglobin as plasma. The process of carbon dioxide converting into…arrow_forwardNeither O2 or CO2 are highly soluble is the aqueous environment that surrounds all cells. Mammals have developed hemoglobin to bind oxygen to greatly increase the amount of oxygen gas that can be carried in blood. How is the majority of carbon dioxide transported in the blood? O Carbon dioxide is produced at such a low level that it can be transported as the gas. O The majority of carbon dioxide binds to amino acids of hemoglobin O The majority of carbon dioxide is bond to specific carbon dioxide-binding proteins in blood. O The majority of carbon dioxide combines with water to form bicarbonate which is soluble in water.arrow_forwardPart C - Exploring the cooperative binding of oxygen Oxygen shows cooperative binding to hemoglobin. Cooperative binding has the following effects on the binding and release of oxygen: Oxygen binding to hemoglobin: When one molecule of oxygen binds to one of hemoglobin's four subunits, the other subunits change shape slightly, increasing their affinity for oxygen. Oxygen release from hemoglobin: When four oxygen molecules are bound to hemoglobin's subunits and one subunit releases its oxygen, the other three subunits change shape again. This causes them to release their oxygen more readily. These two graphs show how cooperative binding differs from a hypothetical situation where binding is not cooperative. • The x-axis shows the partial pressure of oxygen (PO₂). This is a measure of the amount of oxygen present in a tissue. The blue arrows on the x-axis show the partial pressure of oxygen in various tissues of the body. • The y-axis shows the oxygen saturation of hemoglobin (O₂…arrow_forward
- Diagram the four basic steps of O2 transport from an animal’srespiratory medium (air or water) to its cells.arrow_forwardThe center solid curve represents the oxygen dissociation of hemoglobin, pH, Oxyhaemoglobin (% Saturation) concentration, and an increase in concentration of 2,3 bisphosphoglycerate. 100 90 80 70 60 50 40 30 20 10 I represents the curve at a decreased CO2 represents this curve at a reduced A B represents the curve with 1 10 20 30 40 50 60 70 80 90 100arrow_forwardwhich of adult haemoglobin or foetal haemoglobin will have a lower P50 value for binding O2. Be sure to define the term P50 and mention at a molecular level what interactions and structure differences are contribute to the observed values.arrow_forward
- 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.arrow_forwardDiscuss the importance of the CO2/HCO3 - equilibrium in blood and in urinearrow_forwardProvide an example of HOW the body over time can improve each How will O2 transportation increase? How would the body increase internal respiration? How could the body increase energy production via cellular respiration?arrow_forward
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