37 Questions
What is the function of lymph nodes?
Filtration of lymph to remove debris and pathogens
What is the primary role of tonsils in the immune system?
Developing immunity to oral pathogens
Where are mucosa-associated lymphoid tissues (MALT) found?
Breast tissue, lungs, and eyes
What is the main characteristic of lymphoid nodules?
Lack of a fibrous capsule
What makes the spleen known as the 'filter of the blood'?
Presence of dendrites and macrophages
Which vessels enter the lymph nodes?
Afferent lymphatic vessels
What is the primary function of plasma cells?
To secrete soluble antibodies
Where do B cells mature and develop?
In the red bone marrow
Which of the following statements about the thymus is correct?
It may be completely absent at the age of 120.
Which of the following is NOT considered a secondary lymphoid organ?
Bone marrow
What is the primary function of Natural Killer (NK) cells?
To serve as the first line of defense against viruses and some cancers
What is the characteristic of Type 1 hypersensitivity reactions?
Involves IgE binding to mast cells causing degranulation
How are Type 2 hypersensitivity reactions typically triggered?
Mismatched blood transfusions
What is the characteristic of Type 3 hypersensitivity reactions?
Systemic disease with accumulation of antigens and antibodies along blood vessel linings
How are autoimmune diseases typically treated?
With immunosuppressive drugs and anti-inflammatories
What must match in an organ transplant to increase the likelihood of its success?
Mismatched MHC alleles
What is the role of a healthy immune system in controlling cancers?
Controlling some cancers
What is the primary function of bronchus-associated lymphoid tissue (BALT)?
To provide an effective immune response against inhaled pathogens
Which of the following is NOT a component of the innate immune response?
T cells
What is the primary function of granzymes in the innate immune response?
To trigger apoptosis in infected cells
Which of the following is NOT a function of the complement system?
Producing antibodies against pathogens
What is the primary role of histamine in the inflammatory response?
To cause vasodilation and increase capillary permeability
Which of the following is NOT a characteristic of the adaptive immune response?
Rapid response to pathogens
What is the primary function of major histocompatibility complex (MHC) molecules?
To present antigens to T cells
Which type of antigen is typically presented by class II MHC molecules?
Extracellular antigens
What is the primary function of pattern recognition receptors in the innate immune response?
To recognize and bind to pathogens or molecules released by damaged cells
Which type of immune response is responsible for autoimmune diseases?
Adaptive immune response
What is the role of macrophages in the immune response?
Stimulate phagocytosis at the site of infection
What is the primary function of dendritic cells in the immune response?
Bring antigens to regional lymph nodes
Which of the following statements about T cell tolerance is correct?
It involves eliminating T cells that might attack the body's own cells
What is the primary function of helper T cells (Th1 and Th2)?
Secrete cytokines to enhance other immune responses
What is the primary function of cytotoxic T cells in the immune response?
Kill target cells by inducing apoptosis
Which of the following statements about B cells is correct?
B cells can recognize unprocessed antigens without MHC presentation
What is the primary function of IgM antibodies in the immune response?
Activate the complement system and facilitate binding
Which of the following antibody classes is primarily involved in allergic reactions?
IgE
What is the difference between active and passive immunity?
Active immunity leads to immunological memory, while passive immunity does not
Which of the following statements about mucosal immune responses is correct?
Mucosal immune responses neutralize pathogens by coating them with IgA and IgM antibodies
Test your knowledge on how B cells differentiate into plasma cells, the role of antigens, T cells, plasma cells, and natural killer cells in the immune response.
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