Human Biology Custom Edition
11th Edition
ISBN: 9781337631532
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 8, Problem 4SQ
In the lungs, the main factor in boosting the tendency of hemoglobin to bind with and hold oxygen is ___.
- a. temperature c. acidity (pH)
- b. the amount of O2 relative to the amount of CO2 in plasma
- c. acidity(pH)
- d. all are equally important
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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 scenariosare correct?Select all that apply
A. High levels of PCO2will cause loading of O2ontohemoglobin.
B. An increase in pH will causeO2to unload from hemoglobin.
C. High PO2levels will increase saturation of Hb with O2.
D. An increase in bodytemperature will cause O2to unload from hemoglobin.
O2 bound to hemoglobin:
a.
acts the same as physically dissolved oxygen
b.
Comes off the hemoglobin (dissociates) more easily as you increase the oxygen partial pressure
c.
exerts a partial pressure
d.
Comes off the hemoglobin (dissociates) more easily as you increase the acidity (decrease the pH)
e.
all the options are correct
2. Air convection in mammals is driven by a smaller pressure gradient than blood convection because:
a.
Bronchioles have a greater resistance to flow than arterioles
b.
bronchioles tend to have a smaller radius than arterioles and capillaries
c.
air is easier to move with pressure gradients than blood
d.
air generally travels farther in your body than does blood
e.
air is heavier than blood
3. The rate of diffusion of gases is NOT determined by which of the following?
a.
The area of the surface across which diffusion is occurring
b.
The mechanical energy…
Chapter 8 Solutions
Human Biology Custom Edition
Ch. 8 - Prob. 1RQCh. 8 - What are the cellular components of blood? Where...Ch. 8 - Prob. 3RQCh. 8 - What is an agglutination response? How can it be...Ch. 8 - Prob. 5RQCh. 8 - Prob. 1SQCh. 8 - Prob. 2SQCh. 8 - Prob. 3SQCh. 8 - In the lungs, the main factor in boosting the...Ch. 8 - Which of the following statements about red blood...
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- 1. Carbon dioxide released during respiration can affect the % oxygen saturation of haemoglobin. Carbon dioxide reacts with water to form carbonic acid. Which statements below explains the effect of carbon dioxide on haemoglobin? A. The release of hydrogen ions causes the pH to rise, which reduces haemoglobin's affinity for охуgen. B. The release of hydrogen ions causes the pH to rise, which increases haemoglobin's affinity for oxygen. C. The release of hydrogen ions causes the pH to fall, which increases haemoglobin's affinity for охygen. D. The release of hydrogen ions causes the pH to fall, which reduces haemoglobin's affinity for охуgen. E. None of the above can explain the change. 2. The following events occur when carbon dioxide enters an erythrocyte in a capillary. 1. Hydrogencarbonate ions diffuse into the plasma from the red blood cell 2. Dissociation of carbonic acid 3. Carbon dioxide reacts with water forming carbonic acid 4. Chloride ions diffuse into red blood cell from…arrow_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_forward1. carbon dioxide released during respiration can affect the % oxygen saturation of haemoglobin. Carbon dioxide reacts with water to form carbonic acid. Which statements below explains the effect of carbon dioxide on haemoglobin? A. The release of hydrogen ions causes the pH to rise, which reduces haemoglobin's affinity for oxygen. B. The release of hydrogen ions causes the pH to rise, which increases haemoglobin's affinity for oxygen. C. The release of hydrogen ions causes the pH to fall, which increases haemoglobin's affinity for oxygen. D. The release of hydrogen ions causes the pH to fall, which reduces haemoglobin's affinity for oxygen. E. None of the above can explain the change. 2. The following events occur when carbon dioxide enters an erythrocyte in a capillary. 1. Hydrogencarbonate ions diffuse into the plasma from the red blood cells. 2. Dissociation of carbonic acid 3. Carbon dioxide reacts with water forming carbonic acid 4. Chloride ions…arrow_forward
- 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 myoglobinarrow_forwardWhich of the following describe(s) a characteristic or function of hemoglobin?a. Hemoglobin consists of four chains of amino acids.b. A hemoglobin molecule contains four iron ions to carry oxygen.c. In addition to transporting oxygen, hemoglobin molecules carry carbon dioxide and hydrogen ions.d. Hemoglobin is a protein found in all formed elements.e. There are four hemoglobin molecules in each red blood cell.arrow_forwardCarbon dioxide when traveling in the form of bicarbonate ion does so ______ a. bonded to water b. associated to hemoglobin c. within the plasma of blood d. within the red blood cellarrow_forward
- 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 PCO2arrow_forwardCarbon Dioxide is carried in the blood by all the following means except: a. dissolved in plasma b. as bicarbonate c. as carbonic acid d. bound to hemoglobin e. all of these methods are used to transport carbon dioxide in bloodarrow_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_forward
- The majority of oxygen in the blood is transported by ________. a. dissolution in the blood b. being carried as bicarbonate ions c. binding to blood plasma d. binding to hemoglobinarrow_forward73) 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_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
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