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Questions and Answers
Which type of phagocytic cell is responsible for early phagocytosis during an infection, before antibodies are available?
Which type of phagocytic cell is responsible for early phagocytosis during an infection, before antibodies are available?
- Dendritic cells
- Phagocytic monocytes (macrophages)
- Polymorph nuclear leukocytes (PMNs)
- Phagocytosis can occur in the absence of serum antibodies (correct)
What is an important function of the spleen?
What is an important function of the spleen?
- Storing excess iron
- Filtering microorganisms from the bloodstream (correct)
- Producing antibodies
- Producing red blood cells
What is the most common bacterial infection that patients without a functional spleen are susceptible to?
What is the most common bacterial infection that patients without a functional spleen are susceptible to?
- Escherichia coli
- Salmonellae
- Pneumococci (correct)
- Staphylococcus aureus
Which of the following is NOT a type of phagocytic cell in the immune system?
Which of the following is NOT a type of phagocytic cell in the immune system?
What is the main consequence of the bone marrow being suppressed, leading to a decrease in the number of functional granulocytes?
What is the main consequence of the bone marrow being suppressed, leading to a decrease in the number of functional granulocytes?
Which of the following components is NOT found in granulocyte granules?
Which of the following components is NOT found in granulocyte granules?
Which of the following is the main function of phagocytic cells during infections?
Which of the following is the main function of phagocytic cells during infections?
Which type of phagocytic cell is primarily responsible for clearing particulate matter from the lymph and bloodstream?
Which type of phagocytic cell is primarily responsible for clearing particulate matter from the lymph and bloodstream?
What is the primary role of the spleen in the immune system?
What is the primary role of the spleen in the immune system?
Which type of phagocytic cell is the first to respond to a bacterial infection, and is crucial for the initial clearance of the pathogen?
Which type of phagocytic cell is the first to respond to a bacterial infection, and is crucial for the initial clearance of the pathogen?
Which type of phagocytic cell is responsible for the production of inflammatory mediators, such as leukotrienes and prostaglandins, during an immune response?
Which type of phagocytic cell is responsible for the production of inflammatory mediators, such as leukotrienes and prostaglandins, during an immune response?
Which of the following is a characteristic of the innate immune system's pattern recognition receptors (PRRs)?
Which of the following is a characteristic of the innate immune system's pattern recognition receptors (PRRs)?
What is the main function of opsonins in phagocytosis?
What is the main function of opsonins in phagocytosis?
Which type of immune cell is primarily responsible for the process known as degranulation?
Which type of immune cell is primarily responsible for the process known as degranulation?
What factor contributes to the inhibition of phagocytic mechanisms in the pathogenesis of legionella pneumonia?
What factor contributes to the inhibition of phagocytic mechanisms in the pathogenesis of legionella pneumonia?
How do activated macrophages contribute to inflammation?
How do activated macrophages contribute to inflammation?
Which immune cell is derived from monocyte stem cells in the bone marrow?
Which immune cell is derived from monocyte stem cells in the bone marrow?
What is the primary effect of ingestion of foreign particles on phagocytic granulocytes?
What is the primary effect of ingestion of foreign particles on phagocytic granulocytes?
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