27 Questions
What is the primary function of lymph nodes?
To filter the blood and remove debris and pathogens
What is the difference between lymphoid nodules and lymph nodes?
Lymphoid nodules are found in the respiratory and digestive tracts, while lymph nodes are found throughout the body
What is the role of the spleen in the lymphatic system?
The spleen filters the blood and removes debris and pathogens
What is the function of mucosa-associated lymphoid tissue (MALT)?
MALT is involved in developing immunity to oral pathogens
Which of the following is NOT a characteristic of lymph nodes?
Entry of blood cells directly into tissues
What is the most serious inherited type of combined immunodeficiency disease (SCID)?
It affects both T and B cells, and most patients die in the first year of life
What is the primary mechanism by which HIV/AIDS wipes out the immune system?
It infects and kills helper T cells, leading to a weakened immune response
Which type of hypersensitivity reaction is characterized by the rapid release of histamine from mast cells?
Type 1 hypersensitivity
What is the primary cause of type 3 hypersensitivity reactions?
Accumulation of antigen-antibody complexes along blood vessel linings
What is the typical timeframe for the symptoms of a type 4 hypersensitivity reaction to develop?
Within 24-72 hours
What is the relationship between autoimmune diseases and the prevalence of infectious diseases in a population?
Autoimmune diseases are more common in populations with lower rates of infectious diseases
Which of the following is NOT a function of the lymphatic system?
Pumping blood throughout the body
What is the primary function of lymph nodes?
Serving as a major staging area for the development of critical immune responses
Which of the following statements about lymph vessels is correct?
They are composed of simple squamous epithelial cells
Which of the following is a function of T cells?
Secreting chemokines to bring other immune cells to an area
Which of the following is NOT a barrier defense in the immune system?
Phagocytic cells
Where do B cells develop?
Red bone marrow
Which of the following is NOT a function of the innate immune system?
Recognizing and responding to specific pathogens encountered before
What is the primary role of neutrophils in the immune response?
Acting as phagocytes and cooperating with lymphocytes
What is the primary function of perforins and granzymes in the immune response?
Inducing apoptosis in infected cells
Which of the following is NOT a characteristic of chronic inflammation?
A short-term response to injury
What is the primary function of helper T cells (Th cells) in the immune response?
Enhancing the immune response by secreting cytokines
What is the primary function of regulatory T cells in the immune system?
Suppressing other T cell immune responses
Which of the following antibody classes is primarily involved in allergic reactions and anaphylaxis?
IgE
What is the primary difference between active and passive immunity?
Active immunity is acquired through exposure to pathogens, while passive immunity involves the transfer of antibodies
Which of the following is the primary mechanism by which viruses are fought by the immune system?
Cytotoxic T cells, interferons, and natural killer cells
What is the primary role of seroconversion in the immune response?
Monitoring the levels of antibodies and pathogens in the blood
This quiz covers immune system cells and organs that destroy pathogens, the lymphatic system's role in filtering pathogens and bringing excess fluid to the bloodstream, and the absorption of dietary lipids and fat-soluble vitamins. It also discusses the lymph nodes as a major staging area for the development of critical immune responses.
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