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Ch. 19 Blood
Amerman- Human Anatomy & Physiology 3e
Amerman3rd EditionHuman Anatomy & PhysiologyISBN: 9780138247201, 9780138247928, 9780138201814Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoAmerman 3rd EditionCh. 19 BloodProblema 4d
Capitolo 19, Problema 4d

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Hemoglobin consists of two polypeptide chains bound to a heme group.

Guida verificata passo dopo passo
1
Step 1: Understand the structure of hemoglobin. Hemoglobin is a protein found in red blood cells responsible for oxygen transport. It consists of four polypeptide chains (not two), specifically two alpha chains and two beta chains, each bound to a heme group.
Step 2: Analyze the statement provided. The statement claims that hemoglobin consists of two polypeptide chains bound to a heme group. Compare this claim to the correct structure of hemoglobin.
Step 3: Identify the error in the statement. The statement is false because hemoglobin consists of four polypeptide chains, not two.
Step 4: Correct the false statement. The corrected statement should read: 'Hemoglobin consists of four polypeptide chains, each bound to a heme group.'
Step 5: Review the corrected statement and ensure it aligns with the accurate description of hemoglobin's structure.

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Hemoglobin Structure

Hemoglobin is a protein in red blood cells responsible for transporting oxygen. It consists of four polypeptide chains—two alpha and two beta chains—each bound to a heme group, which contains iron. This structure allows hemoglobin to effectively bind and release oxygen in the body.
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Structure of Hemoglobin

Polypeptide Chains

Polypeptide chains are long sequences of amino acids linked by peptide bonds, forming the primary structure of proteins. In hemoglobin, the specific arrangement and interaction of these chains are crucial for its function in oxygen transport and release.
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07:41
Electron Transport Chain

Heme Group

The heme group is a complex molecule that contains an iron atom at its center, which is essential for oxygen binding. Each heme group can bind one oxygen molecule, and the presence of four heme groups in hemoglobin allows it to carry up to four oxygen molecules at a time, facilitating efficient oxygen transport in the bloodstream.
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Functional Groups
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Domanda del libro di testo

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

The main function of erythrocytes is to transport oxygen on the protein hemoglobin.

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Domanda del libro di testo

Erythrocytes are derived from stem cells called____, circulate in the blood for approximately _______ days, and are destroyed by an organ called the _______.

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Domanda del libro di testo

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

Hemoglobin forms oxyhemoglobin when it binds to oxygen.

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Domanda del libro di testo

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

Erythrocytes are biconcave discs with prominent nuclei.

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Domanda del libro di testo

Erythropoiesis requires stimulation from the hormone:

a. Thrombin

b. Thrombopoietin

c. Thymosin

d. Erythropoietin

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Domanda del libro di testo

Anemia is defined as:

a. A decreased oxygen-carrying capacity of the blood.

b. A decreased iron content of the blood.

c. Decreased bone marrow function.

d. Abnormalities in hemoglobin.

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