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When naïve B cells are activated, they differentiate into:
a. plasma cells.
b. memory cells.
c. both a and b.
d. none of the above.
21. The Immune System
Antigens
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A nonself substance that can provoke an immune response is called a(n) __________.
A
interferon
B
antigen
C
antibody
D
immunoglobulin
E
colony-stimulating factor
Verified step by step guidance1
Understand the context: The problem is asking for a term that describes a substance capable of provoking an immune response.
Identify key terms: 'Nonself' refers to substances that are recognized as foreign by the immune system.
Recall relevant concepts: The immune system identifies and responds to foreign substances, often referred to as antigens.
Differentiate between options: Interferons are proteins that interfere with viral replication, antibodies are proteins that recognize and bind to antigens, immunoglobulins are a type of antibody, and colony-stimulating factors are involved in the production of blood cells.
Conclude with the correct term: The term that best fits the description of a nonself substance provoking an immune response is 'antigen'.
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