Textbook Question
On which type(s) of cells are class I MHC molecules located?
a. Antigen-presenting cells only
b. B cells only
c. All nucleated body cells
d. Antigen-presenting cells and B cells
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21. The Immune System
Antigens
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What is the primary difference between antigens and antibodies?
A
Antigens are enzymes that digest pathogens, while antibodies are lipids that store energy.
B
Antigens are proteins produced by the immune system, while antibodies are foreign substances that trigger an immune response.
C
Antigens are foreign substances that trigger an immune response, while antibodies are proteins produced by the immune system to neutralize antigens.
D
Antigens and antibodies are both types of white blood cells involved in the immune response.
Verified step by step guidance1
Understand the role of antigens: Antigens are foreign substances, such as bacteria, viruses, or toxins, that enter the body and trigger an immune response.
Recognize the function of antibodies: Antibodies are proteins produced by the immune system, specifically by B cells, to identify and neutralize antigens.
Differentiate between antigens and antibodies: Antigens are the targets that the immune system responds to, while antibodies are the defense mechanism that the body uses to fight off these antigens.
Clarify the misconception: Antigens are not enzymes or white blood cells; they are foreign substances. Similarly, antibodies are not lipids or white blood cells; they are proteins.
Summarize the correct relationship: Antigens trigger the immune response, and antibodies are the proteins that the immune system produces to neutralize and eliminate antigens.
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