Multiple Choice
Which type of cell is primarily responsible for producing antibodies in the immune system?
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41. Immune System
Immune System
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Which part of the immune system acts as a physical barrier to pathogens?
A
T cells
B
Antibodies
C
Skin
D
Macrophages
Verified step by step guidance1
Understand the immune system's components: The immune system has multiple layers of defense, including physical barriers, innate immunity, and adaptive immunity. Physical barriers are the first line of defense against pathogens.
Identify the role of physical barriers: Physical barriers prevent pathogens from entering the body. Examples include the skin, mucous membranes, and secretions like saliva and tears.
Analyze the options provided: T cells and antibodies are part of the adaptive immune system, which responds to specific pathogens. Macrophages are part of the innate immune system and help engulf and destroy pathogens. None of these act as physical barriers.
Focus on the skin: The skin is a physical barrier that protects the body from external pathogens. It acts as a shield, preventing microorganisms from entering the body.
Conclude that the correct answer is 'Skin': Based on the explanation, the skin is the part of the immune system that acts as a physical barrier to pathogens.
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