Textbook Question
Give a function for each of the following:
(l) Interleukins
(m) Tumor necrosis factor
(n) Colony-stimulating factors
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21. The Immune System
Phagocytosis
Problem 7d
Textbook Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
d.Interleukin-1 is a cytokine that prevents viral replication in infected cells.
Verified step by step guidance1
Step 1: Understand the term 'Interleukin-1' (IL-1). Interleukin-1 is a cytokine, which is a type of signaling molecule involved in immune responses. It plays a role in inflammation, fever, and the activation of immune cells, but it is not primarily responsible for preventing viral replication.
Step 2: Recognize the cytokine responsible for preventing viral replication. Interferons, specifically interferon-alpha and interferon-beta, are the cytokines that inhibit viral replication in infected cells by interfering with the virus's ability to reproduce.
Step 3: Evaluate the statement provided. The statement claims that Interleukin-1 prevents viral replication in infected cells. Based on the information above, this is false because Interleukin-1 does not perform this function.
Step 4: Correct the false statement. The corrected statement should read: 'Interleukin-1 is a cytokine involved in inflammation and immune system activation, but it does not prevent viral replication in infected cells.'
Step 5: Review the corrected statement and ensure clarity. Verify that the corrected statement accurately reflects the role of Interleukin-1 and distinguishes it from the function of interferons.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Cytokines
Cytokines are small proteins released by cells that have a specific effect on the interactions and communications between cells. They play crucial roles in the immune response, inflammation, and the regulation of cell growth and differentiation. Understanding cytokines is essential for grasping how the immune system responds to infections and diseases.
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Cytokines
Interleukin-1 (IL-1)
Interleukin-1 is a type of cytokine that is primarily involved in the inflammatory response. It is produced by activated macrophages and plays a key role in mediating immune responses, including fever and the activation of lymphocytes. However, IL-1 does not directly prevent viral replication; instead, it promotes inflammation and immune activation.
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Viral Replication
Viral replication is the process by which a virus makes copies of itself within a host cell. This process typically involves the virus hijacking the host's cellular machinery to produce viral components, which are then assembled into new viral particles. Understanding this concept is crucial for developing antiviral therapies that can inhibit various stages of the viral life cycle.
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