Textbook Question
Relate the structure of hemoglobin to its function.
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17. The Blood
Introduction To Blood
Problem 4a
Textbook Question
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.
Verified step by step guidance1
Step 1: Begin by analyzing the statement provided: 'Erythrocytes are biconcave discs with prominent nuclei.' Break it into two parts: (1) Erythrocytes are biconcave discs and (2) Erythrocytes have prominent nuclei.
Step 2: Recall the structure of erythrocytes (red blood cells). Erythrocytes are indeed biconcave discs, which is a true characteristic. This shape increases their surface area for gas exchange and allows flexibility to pass through narrow capillaries.
Step 3: Evaluate the second part of the statement regarding nuclei. Erythrocytes in humans lack nuclei (anucleate) to maximize space for hemoglobin, which is essential for oxygen transport. Therefore, the claim that erythrocytes have prominent nuclei is false.
Step 4: Correct the false part of the statement. The corrected statement should read: 'Erythrocytes are biconcave discs without nuclei.'
Step 5: Summarize the process: The statement is partially true (biconcave discs) and partially false (prominent nuclei). The correction ensures the statement aligns with the anatomical and physiological characteristics of erythrocytes.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Erythrocytes
Erythrocytes, or red blood cells, are specialized cells in the blood responsible for transporting oxygen from the lungs to the body's tissues and returning carbon dioxide for exhalation. They are characterized by their biconcave disc shape, which increases surface area for gas exchange and allows flexibility to navigate through capillaries.
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Structure of Erythrocytes
Cell Structure
The structure of erythrocytes is unique as they lack a nucleus and most organelles in their mature form. This adaptation allows for more space to carry hemoglobin, the protein that binds oxygen. The absence of a nucleus also contributes to their biconcave shape, enhancing their efficiency in gas transport.
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True/False Statements
In evaluating statements as true or false, it is essential to understand the factual basis of the claims made. A true statement accurately reflects scientific knowledge, while a false statement contains inaccuracies that can be corrected. In this case, the statement about erythrocytes being biconcave discs with prominent nuclei is false and requires correction to reflect their actual structure.
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