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What is the role of blood in the stabilization and maintenance of body temperature?
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Ch. 19 Blood
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089
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TOC.tableOfContents
- Ch. 1 An Introduction to Anatomy and Physiology26
- Ch. 2 The Chemical Level of Organization34
- Ch. 3 The Cellular Level of Organization30
- Ch. 4 The Tissue Level of Organization24
- Ch. 5 The Integumentary System17
- Ch. 6 Bones and Bone Structure36
- Ch. 7 The Axial Skeleton11
- Ch. 8 The Appendicular Skeleton17
- Ch. 9 Joints13
- Ch. 10 Muscle Tissue12
- Ch. 11 The Muscular System28
- Ch. 12 Nervous Tissue18
- Ch. 13 The Spinal Cord, Spinal Nerves, and Spinal Reflexes22
- Ch. 14 The Brain and Cranial Nerves20
- Ch. 15 Sensory Pathways and the Somatic Nervous System17
- Ch. 16 The Autonomic Nervous System and Higher-Order Functions30
- Ch. 17 The Special Senses16
- Ch. 18 The Endocrine System20
- Ch. 19 Blood31
- Ch. 20 The Heart31
- Ch. 21 Blood Vessels and Circulation29
- Ch. 22 The Lymphatic System and Immunity31
- Ch. 23 The Respiratory System12
- Ch. 24 The Digestive System18
- Ch. 26 The Urinary System31
- Ch. 27 Fluids & Electrolytes32
- Ch. 28 The Reproductive System12
- Ch. 29 Development and Inheritance23
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089Non è quello che usi tu?Cambia libro di testo
Capitolo 19, Problema 26
Relate the structure of hemoglobin to its function.
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Understand that hemoglobin is a protein found in red blood cells responsible for transporting oxygen from the lungs to tissues and returning carbon dioxide from tissues to the lungs.
Recognize that hemoglobin has a quaternary structure composed of four polypeptide chains (two alpha and two beta chains), each containing a heme group with an iron (Fe2+) atom at its center.
Explain that the iron atom in each heme group binds reversibly to one oxygen molecule (O2), allowing each hemoglobin molecule to carry up to four oxygen molecules.
Discuss how the quaternary structure allows cooperative binding, meaning the binding of oxygen to one heme group increases the affinity of the remaining heme groups for oxygen, enhancing oxygen uptake and release efficiency.
Highlight that the structural features of hemoglobin, including its subunit arrangement and heme groups, enable it to efficiently pick up oxygen in the lungs and release it in tissues where oxygen concentration is lower.
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Hemoglobin Structure
Hemoglobin is a protein composed of four polypeptide chains, each containing a heme group with an iron atom. This quaternary structure allows it to bind oxygen molecules efficiently. The arrangement of subunits facilitates cooperative binding, essential for its function.
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6:45
Structure of Hemoglobin
Oxygen Binding and Transport
Hemoglobin's primary function is to transport oxygen from the lungs to tissues. The iron in the heme groups binds oxygen reversibly, enabling hemoglobin to pick up oxygen in high-oxygen environments and release it where oxygen is low.
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9:16Outcomes of Antibody Binding to Antigen
Cooperative Binding and Allosteric Regulation
Hemoglobin exhibits cooperative binding, meaning the binding of oxygen to one subunit increases the affinity of others. This allosteric effect allows efficient oxygen uptake and release, adapting to varying oxygen demands in different tissues.
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9:16Outcomes of Antibody Binding to Antigen
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How do red blood cells differ from white blood cells in both form and function?
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In the disease mononucleosis ('mono'), the spleen enlarges because of increased numbers of phagocytes and other cells. Common signs and symptoms of this disease include pale complexion, a tired feeling, and a lack of energy sometimes to the point of not being able to get out of bed. What might cause these signs and symptoms?
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How do elements of blood defend against toxins and pathogens in the body?
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A test for prothrombin time is used to identify deficiencies in the extrinsic clotting pathway; prothrombin time is prolonged if any of the factors are deficient. A test for activated partial thromboplastin time is used in a similar fashion to detect deficiencies in the intrinsic clotting pathway. Which factor would be deficient if a person had a prolonged prothrombin time but a normal partial thromboplastin time?
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