Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Chapter 10, Problem 9SQ
Summary Introduction
Introduction: Hemoglobin is a globular protein molecule that is located in erythrocytes (red blood cells). It is composed of four subunits namely two alpha subunits and two beta subunits. Each subunit of hemoglobin surrounds a central heme group that contains iron.
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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
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 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 10 Solutions
Human Biology (MindTap Course List)
Ch. 10 - In the diagram below, label the parts of the...Ch. 10 - What is the difference between respiration and...Ch. 10 - Explain what a partial pressure gradient is and...Ch. 10 - What is oxyhemoglobin? Where does it form?Ch. 10 - What drives oxygen from the air spaces in alveoli,...Ch. 10 - How does hemoglobin help maintain the oxygen...Ch. 10 - What reactions enhance the transport of carbon...Ch. 10 - How do nerve impulses from the brain regulate...Ch. 10 - Why does your breathing rate increase when you...Ch. 10 - A partial pressure gradient of oxygen exists...
Ch. 10 - The ________ is an airway that connects the nose...Ch. 10 - Oxygen in air must diffuse across______ to enter...Ch. 10 - Prob. 4SQCh. 10 - Gas exchange occurs at the _______. a. two bronchi...Ch. 10 - Breathing _______. a. ventilates the lungs b....Ch. 10 - After oxygen diffuses into lung capillaries, it...Ch. 10 - Due to its partial pressure gradient, carbon...Ch. 10 - Prob. 9SQCh. 10 - Prob. 10SQCh. 10 - Cases of accidental carbon monoxide poisoning...Ch. 10 - Prob. 2CTCh. 10 - When you sneeze, abdominal muscles abruptly...Ch. 10 - Underwater, we humans cant compete with whales and...Ch. 10 - Prob. 5CT
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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_forwardWhich of the following are most closely associated with oxygen transport? (a) red blood cells (b) platelets (c) neutrophils (d) basophils (e) lymphocytesarrow_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_forward
- Haemoglobin... A. Consists of one or more globin proteins, each with a copper-containing heme group B. Increases the concentration of O₂ in the blood C. Is present only in vertebrates D. Is located within "pink cells" that circulate in the blood E. All of the abovearrow_forwardWhich of the components of hemoglobin is correctly matched with itsfate following the destruction of a red blood cell?a. heme—reused to form a new hemoglobin moleculeb. globin—broken down into amino acidsc. iron—mostly secreted in biled. All of these are correctarrow_forward8)After blood is “used” by cells, in other words they’ve taken the oxygen, where does it go? Select one: a. Back to the lungs for more oxygen b. Back to the heart and then on to the lungs for more oxygen c. Back to the heart to return to the body for more oxygen d. Back to the capillary beds for more oxygen e. Back to the brain, where the oxygen level is monitoredarrow_forward
- An 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_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_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_forward
- 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.arrow_forwardWhich of the following statements is correct? a. Arteries carry blood away from the heart and veins carry blood to the heart. b. Arteries carry blood to the heart and veins carry blood away from the heart. C. All arteries carry oxygen-rich blood and veins carry oxygen-poor blood. d. Arteries carry oxygen-poor blood and veins carry oxygen-rich blood.arrow_forwardHemoglobin is an iron-containing respiratory pigment found in O a. erythrocytes O b. plasma O c. thrombocytes O d. leukocytesarrow_forward
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