Multiple Choice
Which disease is caused by the body's immune system attacking its own healthy cells?
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41. Immune System
Immune System
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Which body system produces proteins, such as antibodies, that help fight infections?
A
Respiratory system
B
Immune system
C
Digestive system
D
Nervous system
Verified step by step guidance1
Step 1: Begin by identifying the primary function of each body system listed in the problem. For example, the respiratory system is responsible for gas exchange (oxygen and carbon dioxide), the digestive system processes food and absorbs nutrients, and the nervous system controls and coordinates body activities.
Step 2: Recall the role of the immune system. The immune system is responsible for defending the body against pathogens (such as bacteria, viruses, and other harmful microorganisms). It produces specialized proteins, such as antibodies, to neutralize or destroy these invaders.
Step 3: Understand what antibodies are. Antibodies are proteins produced by B cells (a type of white blood cell) in response to the presence of antigens (foreign substances). They bind specifically to antigens to help eliminate them from the body.
Step 4: Compare the functions of the immune system with the other systems listed. The immune system is the only system that directly produces antibodies to fight infections, making it the correct answer.
Step 5: Conclude that the immune system is the correct answer based on its unique role in producing proteins like antibodies to combat infections.
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