Anatomy & Physiology: The Unity of Form and Function, 7th Edition

Published by McGraw-Hill Education
ISBN 10: 0073403717
ISBN 13: 978-0-07340-371-7

Chapter 18 - Section 18.2 - Erythrocytes - Apply What You Know - Page 680: 1

Answer

Hemoglobin is a protein found in red blood cells that is responsible for binding to and transporting oxygen from the lungs to various tissues in the body. The concentration of hemoglobin in the blood is an important indicator of a person's overall oxygen-carrying capacity. However, in certain situations, such as dehydration, the hemoglobin concentration could appear deceptively high. **Dehydration** occurs when the body loses more fluids (water) than it takes in, leading to a decrease in overall body water content. Dehydration can be caused by various factors, including inadequate fluid intake, excessive sweating, vomiting, diarrhea, and certain medical conditions. **Deceptive High Hemoglobin Concentration in Dehydration**: When a person becomes dehydrated, the total volume of blood in the body decreases due to the loss of fluids. This reduction in blood volume can lead to an increase in the concentration of various blood components, including red blood cells and hemoglobin. However, this increase is not due to an actual increase in the number of red blood cells or hemoglobin; it's simply a result of the blood becoming more concentrated due to the loss of water. As a result, the hemoglobin concentration per unit of blood volume can appear deceptively high in a dehydrated individual. This can lead to a misinterpretation of the true oxygen-carrying capacity of the blood. In other words, the higher hemoglobin concentration may not reflect an improved ability to transport oxygen, as the actual number of red blood cells carrying oxygen may not be increased. It's important to note that dehydration can have adverse effects on health, including reduced blood flow to tissues, impaired thermoregulation, and strain on the cardiovascular system. Additionally, falsely high hemoglobin concentrations due to dehydration could lead to errors in medical diagnosis and treatment if not properly understood and taken into consideration when evaluating a patient's condition.

Work Step by Step

Hemoglobin is a protein found in red blood cells that is responsible for binding to and transporting oxygen from the lungs to various tissues in the body. The concentration of hemoglobin in the blood is an important indicator of a person's overall oxygen-carrying capacity. However, in certain situations, such as dehydration, the hemoglobin concentration could appear deceptively high. **Dehydration** occurs when the body loses more fluids (water) than it takes in, leading to a decrease in overall body water content. Dehydration can be caused by various factors, including inadequate fluid intake, excessive sweating, vomiting, diarrhea, and certain medical conditions. **Deceptive High Hemoglobin Concentration in Dehydration**: When a person becomes dehydrated, the total volume of blood in the body decreases due to the loss of fluids. This reduction in blood volume can lead to an increase in the concentration of various blood components, including red blood cells and hemoglobin. However, this increase is not due to an actual increase in the number of red blood cells or hemoglobin; it's simply a result of the blood becoming more concentrated due to the loss of water. As a result, the hemoglobin concentration per unit of blood volume can appear deceptively high in a dehydrated individual. This can lead to a misinterpretation of the true oxygen-carrying capacity of the blood. In other words, the higher hemoglobin concentration may not reflect an improved ability to transport oxygen, as the actual number of red blood cells carrying oxygen may not be increased. It's important to note that dehydration can have adverse effects on health, including reduced blood flow to tissues, impaired thermoregulation, and strain on the cardiovascular system. Additionally, falsely high hemoglobin concentrations due to dehydration could lead to errors in medical diagnosis and treatment if not properly understood and taken into consideration when evaluating a patient's condition.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.