The secondary immune response is characterized by:
A delayed and weaker response compared to the primary immune response.
The activation of naive B cells and T cells.
A rapid and robust response due to the presence of memory cells.
The production of IgM antibodies.
The Correct Answer is C
Explanation: The secondary immune response is faster and more potent than the primary immune response due to the presence of memory B cells and memory T cells. These memory cells "remember" the specific antigen from a previous encounter, allowing for a quicker and more effective immune response upon re-exposure to the same antigen.
Incorrect choices:
a. The secondary immune response is faster and stronger compared to the primary immune response, not delayed and weaker.
b. The secondary immune response involves the activation of memory B cells and memory T cells, not naive B cells and T cells.
d. The primary immune response is characterized by the production of IgM antibodies initially, but during the secondary immune response, the production of IgG antibodies predominates, which are more effective in neutralizing antigens.
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Related Questions
Correct Answer is D
Explanation
Explanation: Passive immunity. Passive immunity is acquired when preformed antibodies are transferred from one individual to another. In this case, the mother's antibodies are transferred to her baby through breast milk, providing temporary protection against certain infections.
Incorrect choices:
a. Active immunity is acquired when the immune system is exposed to a pathogen or vaccination, leading to the production of memory cells and long-term protection.
b. Innate immunity is the body's first line of defense against infections and is not transferred from the mother to the baby but rather present from birth.
c. Adaptive immunity is another term for acquired immunity and involves the production of memory cells after exposure to a specific pathogen or vaccination. It is not transferred through breast milk.
Correct Answer is D
Explanation
xplanation: Memory B cells are formed during the primary immune response and play a critical role in the secondary immune response. When re-exposed to the same antigen, memory B cells quickly differentiate into plasma cells that produce large quantities of specific antibodies, leading to a rapid and robust immune response.
Incorrect choices:
a. The production of antibodies during the primary immune response is primarily carried out by plasma cells, not memory B cells.
b. The activation of helper T cells is essential for coordinating the immune response, but memory B cells are not directly responsible for this process.
c. The initiation of the complement cascade is a separate component of the immune response involving complement proteins, and memory B cells are not directly involved in this process.
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