Biological Science, Books a la Carte Plus Mastering Biology with Pearson eText -- Access Card Package (6th Edition)
6th Edition
ISBN: 9780134296029
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Chapter 42, Problem 3TYK
Summary Introduction
Introduction:
Hemoglobin is a tetrameric protein found in the red blood cells. One molecule of hemoglobin binds to four oxygen molecules.
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Check out a sample textbook solutionStudents have asked these similar questions
Which of the following situations occurs if a person's blood becomes more alkaline?
A.
Hemoglobin molecules retain less oxygen per heme group under alkaline conditions than they do at neutral pH or under acidic conditions.
B.
Hemoglobin molecules give up oxygen more readily under alkaline conditions than they do under neutral pH or under acidic conditions.
C.
Hemoglobin molecules change shape and begin to lose oxygen molecules.
D.
Hemoglobin molecules retain oxygen more readily under alkaline conditions than they do at neutral pH or under acidic conditions.
E.
There is no change in hemoglobin's oxygen-binding affinity under alkaline conditions when compared to blood at neutral pH or under acidic conditions.
Which of the following is true about the proximal histidine of hemoglobin?
A. It forms a hydrogen bond with bound oxygen.
B. It is bonded to the Fe2+ atom coordinated by heme
C. It binds oxygen
D. It is not consumed in myoglobin
If the blood lacked red blood cells but the lungs were functioning normally,
A. The arterial PO2 would be normal.
B. The oxygen content of arterial blood would be normal.
C. Both A and B would apply.
D. Neither A nor B would apply
Which of the following would be most affected by a decrease in the affinity of
hemoglobin for oxygen?
A. Arterial PO2
B. Arterial percent oxyhemoglobin saturation
C. Venous oxyhemoglobin saturation
D. Arterial PCO2
Chapter 42 Solutions
Biological Science, Books a la Carte Plus Mastering Biology with Pearson eText -- Access Card Package (6th Edition)
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- The respiratory system_______. a. provides body tissues with oxygen b. provides body tissues with oxygen and carbon dioxide c. establishes how many breaths are taken per minute d. provides the body with carbon dioxidearrow_forwardfactors that affect the unloading (releasing ) of oxygen more quickly from hemoglobin include all the following except a. increased pressure of CO2 b. elevated chlorine ions c. increased temp d. lowered pHarrow_forwardWhich of the following statements is true about hemoglobin? a.hemoglobin b. Each hemoglobin molecule is made up of one alpha and one beta chain polypeptide. C. All that is needed to bind oxygen is a molecule of heme. D. Each hemoglobin molecule can carry four oxygen molecules.arrow_forward
- Which of the following causes an increase in hemoglobin’s 02 affinity? A. An increase in the partial pressure of oxygen. B. A decrease in ph C. An increase in the concentration of 2,3 -BPG D. An increase in the partial pressure of carbon dioxidearrow_forwardWhich of the following is incorrect? a. Hemoglobin transports oxygen through the blood from the lungs to the tissues Ob. None; all the other choices are correct c. Hemoglobin transports H+ through the blood from the tissues to the lungs O d. Lower pH increases hemoglobin's O₂-binding affinityarrow_forwardInside a red blood, an oxygen molecule binds what other molecule? A. Glucose B. Hemoglobin C. Carbon Dioxide D. Alveoliarrow_forward
- All of the following are accurate statements about hemoglobin except a. hemoglobin carries oxygen on the Fe ion. b. hemoglobin carries carbon dioxide on the globin. c. hemoglobin carries only a small portion of the total carbon dioxide in the blood (less than 25%). d. hemoglobin releases oxygen at the level of the cell, making hemoglobin more saturated.arrow_forwardWhich of the following statements is true for Bohr effect: a. Bohr effect describes carbon monoxide poisoning. b. Bohr effect prevents oxygen binding to hemoglobin. c. Bohr effect allows effective oxygen discharge in tissues due to higher acidity (decreased pH) than in lungs. d. Bohr effect allows effective oxygen discharge in tissues due to lower acidity (increased pH) than in lungs.arrow_forwardCarbon monoxide poisoning occurs because a. CO2 and O2 compete for the same binding site on hemoglobin. b. CO and CO2 compete for the same binding site. c. Hemoglobin in the presence of CEO destroys the oxygen. d. All answers are correctarrow_forward
- Which of the following will NOT facilitate the transfer of oxygen to tissues? a. decreased body temperature b. decreased pH of the blood c. increased carbon dioxide d. increased exercisearrow_forwardRespiratory alkalosis is recognized as a respiratory rate in excess of that which maintains normal plasma PCO2 levels. What is a common cause of respiratory alkalosis?a. Hyperventilation syndromeb. Hypoventilation syndromec. Cluster breathingd. Kussmaul breathingarrow_forwardAn obstruction in the trachea could cause: A. A drop in the body's pH B. An increase in the body's pH C. Acidosis D. Both A & Carrow_forward
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