Memory in the context of the immune system refers to:
The ability of immune cells to recognize and respond to specific antigens.
The ability of immune cells to differentiate between self and non-self antigens.
The process of phagocytosis by macrophages.
The ability of B cells to produce antibodies.
The Correct Answer is A
Explanation: Memory in the immune system refers to the ability of immune cells, particularly memory B cells and memory T cells, to recognize and respond more quickly and effectively to specific antigens upon subsequent exposure. This leads to a faster and stronger secondary immune response.
Incorrect choices:
b. The ability of immune cells to differentiate between self and non-self antigens refers to the concept of immune tolerance, which helps prevent the immune system from attacking the body's own cells and tissues.
c. The process of phagocytosis by macrophages is a mechanism by which immune cells engulf and destroy pathogens and cellular debris, but it is not directly related to memory in the immune system.
d. The ability of B cells to produce antibodies is an essential part of the primary immune response, but it is not specific to memory in the immune system.
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Related Questions
Correct Answer is B
Explanation
Explanation: Immune disorders can result from either an overactive immune system (autoimmune disorders) or an underactive immune system (immunodeficiency disorders). In autoimmune disorders, the immune system attacks the body's own tissues, while in immunodeficiency disorders, the immune system is weakened, making the individual more susceptible to infections.
Correct Answer is C
Explanation
Explanation: B cells are a type of lymphocyte that plays a central role in the adaptive immune response. When activated by the presence of specific antigens, B cells differentiate into plasma cells, which are responsible for producing large quantities of antibodies that can target and neutralize the invading pathogen.
Incorrect choices:
a. T cells are another type of lymphocyte that is involved in cell-mediated immunity, where they directly attack infected or abnormal cells. They do not produce antibodies.
b. Natural killer cells are part of the innate immune system and are responsible for killing infected or cancerous cells. They are not involved in antibody production.
d. Macrophages are phagocytic cells that engulf and destroy pathogens and debris in the body. While they play a crucial role in immune responses, they do not produce antibodies.
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