Immunity
Immunity ( 54 Questions)
B cells produce antibodies against specific antigens but do not directly engulf and destroy pathogens.
T cells are involved in cell-mediated immunity and directly attack infected or abnormal cells but do not have phagocytic capabilities like macrophages.
Macrophages are a type of white blood cell that plays a crucial role in the innate immune response. They are phagocytes, meaning they engulf and destroy pathogens, cellular debris, and foreign substances in the body. Macrophages are also antigen-presenting cells, as they process and present antigens to other immune cells to initiate an adaptive immune response.
Natural killer cells are a type of lymphocyte involved in the innate immune response and can directly kill infected or abnormal cells, but they do not primarily function as phagocytes like macrophages.
Explanation: Macrophages are a type of white blood cell that plays a crucial role in the innate immune response. They are phagocytes, meaning they engulf and destroy pathogens, cellular debris, and foreign substances in the body. Macrophages are also antigen-presenting cells, as they process and present antigens to other immune cells to initiate an adaptive immune response.
Incorrect choices:
a. B cells produce antibodies against specific antigens but do not directly engulf and destroy pathogens.
b. T cells are involved in cell-mediated immunity and directly attack infected or abnormal cells but do not have phagocytic capabilities like macrophages.
d. Natural killer cells are a type of lymphocyte involved in the innate immune response and can directly kill infected or abnormal cells, but they do not primarily function as phagocytes like macrophages.