Multiple Choice
Phagocytosis is best defined as __________.
41. Immune System
Immune System
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Which of the following types of cells initiate a secondary immune response?
A
Cytotoxic cells
B
Natural killer cells
C
Effector cells
D
Plasma cells
E
Memory cells
Verified step by step guidance1
Understand the role of memory cells in the immune system. Memory cells are a type of lymphocyte that remain in the body after an initial immune response and can quickly respond to a previously encountered antigen.
Differentiate between primary and secondary immune responses. The primary immune response occurs when the immune system first encounters a pathogen, while the secondary immune response is a more rapid and robust reaction upon subsequent exposure to the same pathogen.
Identify the types of cells involved in the immune response. Cytotoxic cells, natural killer cells, effector cells, and plasma cells all play roles in the immune system, but they have different functions.
Recognize that memory cells are specifically responsible for initiating the secondary immune response. They 'remember' the pathogen from the first encounter and enable a faster and more effective response upon re-exposure.
Conclude that memory cells are the correct answer because they are the ones that initiate the secondary immune response by quickly recognizing and responding to the previously encountered antigen.
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