Textbook Question
The white blood cell that releases histamine and other inflammatory chemicals is:
a. Basophil
b. Neutrophil
c. Monocyte
d. Eosinophil
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17. The Blood
Leukocytes
Problem 13
Textbook Question
What four characteristics of WBCs are important to their response to tissue invasion or injury?
Verified step by step guidance1
Identify the four key characteristics of white blood cells (WBCs) that enable them to respond effectively to tissue invasion or injury.
First, consider 'chemotaxis,' which is the ability of WBCs to move directionally toward the site of infection or injury in response to chemical signals released by damaged cells or pathogens.
Second, examine 'diapedesis,' the process by which WBCs squeeze through the endothelial cells of blood vessel walls to exit the bloodstream and enter the affected tissue.
Third, focus on 'phagocytosis,' the capability of certain WBCs to engulf and digest pathogens, debris, or foreign particles at the site of injury.
Fourth, understand 'adhesion,' which refers to the ability of WBCs to stick to the blood vessel walls and to each other, facilitating their migration and accumulation at the site of tissue damage.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Chemotaxis
Chemotaxis is the process by which white blood cells (WBCs) move directionally toward the site of tissue invasion or injury in response to chemical signals. This allows WBCs to locate and accumulate where they are needed to fight infection or repair damage.
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Steps of Phagocytosis
Phagocytosis
Phagocytosis is the ability of certain WBCs to engulf and digest pathogens, dead cells, and debris. This function is crucial for clearing infections and cleaning up damaged tissue during the immune response.
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2:19Phagocytosis
Diapedesis
Diapedesis refers to the ability of WBCs to move out of the bloodstream by squeezing through the endothelial cells of blood vessels. This enables them to reach the affected tissues where they perform their immune functions.
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2:39Step 3: Vasodilation
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