Campbell Essential Biology with Physiology (6th Edition)
6th Edition
ISBN: 9780134711751
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Chapter 23, Problem 11SQ
Summary Introduction
Introduction: Carbon monoxide is a poisonous, odorless, tasteless, and colorless gas. If a person is exposed to high amounts of carbon monoxide, it can be dangerous. It is an ‘invisible killer’.
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Which of the following statements is INCORRECT about how the components of hemoglobin are recycled?
a. Iron ions are either stored in a phagocytic cell or circulate in the blood, bound to transferrin (a plasma protein).
b. Each heme is stripped of its iron and converted to bilirubin, then excreted in bile.
c. The alpha and beta chains are released into the bloodstream for use by other cells.
d. Hemoglobin can be recycled only if phagocytized by macrophages.
Suppose a hypothetical "molecule X" binds to hemoglobin (at a different site than the O2 binding site) and stabilizes the T state. How would you identify this effector?
a. Positive homotropic effector
b. Negative homotropic effector
c. Positive heterotropic effector
d. Negative heterotropic effector
Which 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.
Chapter 23 Solutions
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- What is that component of cigarettes that will compete in binding of RBC hemoglobin-and-Oxygen complex, that consequently is disturbing human oxygenation--- when you will smoke or inhale it? a. tar b. nicotine c. carbon monoxide d. carbon dioxide *Choose only one answerarrow_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_forwardWhat is the biological advantage to the sigmoidal binding curve of hemoglobin for oxygen? A. It ensures that hemoglobin has a high affinity for oxygen. B. It allows hemoglobin to bind oxygen irreversibly. C. It ensures that hemoglobin can bind oxygen only weakly. D. It allows hemoglobin to shift between low and high affinities for oxygen.arrow_forward
- Which 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_forwardWhich of the following stabilize the hemoglobin quaternary structure of low-affinity to oxygen molecules? Group of answer choices a. CO b. CO2 c. bisphosphoglycerate d. H+arrow_forwardWhich of the following is NOT a way that carbon dioxide exits the body? * A. carbon dioxide travels down the concentration gradient and is able to diffuse from the tissues directly out of the body through its pores. B. carbon dioxide dissolves directly into the blood plasma to be carried to the lungs where it will be exhaled. C. Carbon dioxide binds with hemoglobin as red blood cell pass through tissues and is released as the blood cells reached the lungs. D. carbon dioxide converts into bicarbonate ions in the blood as it diffuses from the tissues and converts back to carbon dioxide as it reaches the lungs to be exhaled PLS ANSWWER ASP THANK YOUU SO MUCHarrow_forward
- Which of the following is true about the T (tense) -->R (relaxed) transition of hemoglobin? A. The T state of hemoglobin binds oxygen with a higher affinity than the R state. B. The binding of O2 to a subunit T state can cause the transition of other subunits to the R state. C. The T state has a narrower pocket between b subunits than does the R state. D. When hemoglobin undergoes the T--> R transition, the structures of the individual subunits change dramatically.arrow_forwardAfter a person hyperventilates (such as by holding their breath), what can be detected on a molecular level? a. decrease in oxygen is detected by both central and peripheral chemoreceptors b. increase in oxygen is detected by both central and peripheral chemoreceptors c. increase in carbon dioxide is detected by both central and peripheral chemoreceptors d. decrease in carbon dioxide is detected by both central and peripheral chemoreceptorsarrow_forwardWhich molecule has the greatest ability to stabilize the deoxy state of hemoglobin? Select one: a. all have equal ability b. ВPG C. CO d. H e. Co2arrow_forward
- 73) The Haldane Effect says that it is easier for CO2 to bind to hemoglobin once oxygen has dissociated from the heme group. Group of answer choices True False 74) In the homeostatic regulation of blood oxygen levels, the central processor is the ________. Group of answer choices Blood Oxygen Levels CO2 Receptors Kidney Red Bone Marrow Lungs 75) Boyle’s Law states that there is a directly proportional relationship between the volume of a container and the pressure within that container. Group of answer choices False True 76) All Red Blood Cells are replenished at the same time. Group of answer choices True Falsearrow_forwardFor a patient with a glucose 6-phosphate dehydrogenase deficiency, suffering from the acute onset of hypoxia and anemia, which of the following is the most likely to happen to the red blood cells and lead to anemia? a. The increased presence of methemoglobin in the blood b. The decreased production of hemoglobin during RBC development c. The premature destruction of RBCs in the circulationarrow_forwardWhat has the highest affinity for oxygen? a. Maternal hemoglobin without 2,3-bisphosphoglycerate b. Myoglobin c. Maternal hemoglobin with 2,3-bisphosphoglycerate d. Fetal hemoglobin with 2,3- bisphosphoglyceratearrow_forward
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