MCQ on Reticuloendothelial System: Functions
Frequently Asked MCQ quiz on the Reticuloendothelial System Questions with Answers – MCQ Quiz for Competitive Exam Preparation – These questions given will be useful for competitive exams preparation. We will be updating more mcq regularly, please follow our website regularly.
The reticuloendothelial system (RES), also known as the mononuclear phagocyte system (MPS), is a network of cells and tissues found throughout the body that play a crucial role in the immune response, filtration of foreign particles, and recycling of aged or damaged cells. It includes various types of cells, primarily macrophages and dendritic cells, along with specialized tissues such as the spleen, liver, lymph nodes, and bone marrow.
What is the primary function of the reticuloendothelial system (RES)?
a) Oxygen transport
b) Immune defense
c) Blood clotting
d) pH regulation
Answer: b) Immune defense
Which of the following is NOT a component of the reticuloendothelial system?
a) Liver
b) Spleen
c) Bone marrow
d) Lymph nodes
Answer: d) Lymph nodes
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What is the role of the liver in the reticuloendothelial system?
a) Phagocytosis of pathogens
b) Production of antibodies
c) Storage of iron
d) Production of red blood cells
Answer: a) Phagocytosis of pathogens
Which organ in the reticuloendothelial system is responsible for the filtration of blood and removal of old or damaged red blood cells?
a) Liver
b) Spleen
c) Bone marrow
d) Lymph nodes
Answer: b) Spleen
What is the function of Kupffer cells in the liver within the reticuloendothelial system?
a) Phagocytosis of pathogens
b) Production of antibodies
c) Storage of iron
d) Phagocytosis of old red blood cells
Answer: d) Phagocytosis of old red blood cells
Which cells in the bone marrow are involved in the production of blood cells and contribute to the reticuloendothelial system?
a) Osteocytes
b) Adipocytes
c) Hematopoietic stem cells
d) Chondrocytes
Answer: c) Hematopoietic stem cells
What is the role of macrophages in the reticuloendothelial system?
a) Production of antibodies
b) Phagocytosis of pathogens and cellular debris
c) Storage of iron
d) Oxygen transport
Answer: b) Phagocytosis of pathogens and cellular debris
Which of the following is a function of the reticuloendothelial system in relation to iron metabolism?
a) Storage of iron in the liver
b) Release of iron into the bloodstream
c) Transport of iron to bone marrow for erythropoiesis
d) All of the above
Answer: d) All of the above
What is the primary function of the reticuloendothelial system in relation to immune defense?
a) Production of antibodies
b) Phagocytosis of pathogens and foreign particles
c) Storage of lymphocytes
d) Regulation of cytokine production
Answer: b) Phagocytosis of pathogens and foreign particles
Which component of the reticuloendothelial system plays a role in the removal of immune complexes and pathogens from the bloodstream?
a) Liver
b) Spleen
c) Bone marrow
d) Thymus
Answer: b) Spleen
What is the function of the reticuloendothelial system in relation to hematopoiesis?
a) Production of red blood cells
b) Production of white blood cells
c) Maturation of platelets
d) All of the above
Answer: d) All of the above
Which of the following cells are NOT typically found within the reticuloendothelial system?
a) Macrophages
b) Neutrophils
c) Lymphocytes
d) Plasma cells
Answer: b) Neutrophils
What is the role of the reticuloendothelial system in the metabolism of lipids and lipoproteins?
a) Synthesis of lipids
b) Storage of lipids in adipocytes
c) Phagocytosis of lipoproteins
d) Secretion of lipoproteins into the bloodstream
Answer: c) Phagocytosis of lipoproteins
Which organ of the reticuloendothelial system is responsible for the synthesis of complement proteins?
a) Liver
b) Spleen
c) Bone marrow
d) Thymus
Answer: a) Liver
How does the reticuloendothelial system contribute to the removal of cellular debris and foreign particles from the bloodstream?
a) Phagocytosis by macrophages
b) Production of antibodies
c) Release of cytokines
d) Activation of complement proteins
Answer: a) Phagocytosis by macrophages
Which component of the reticuloendothelial system plays a role in the removal of circulating immune complexes?
a) Liver
b) Spleen
c) Bone marrow
d) Lymph nodes
Answer: b) Spleen
What is the function of sinusoidal endothelial cells in the liver within the reticuloendothelial system?
a) Phagocytosis of pathogens
b) Regulation of iron metabolism
c) Synthesis of clotting factors
d) Storage of bile
Answer: b) Regulation of iron metabolism
What is the term for the process by which macrophages engulf and digest foreign particles, cellular debris, and microorganisms?
a) Phagocytosis
b) Pinocytosis
c) Exocytosis
d) Endocytosis
Answer: a) Phagocytosis
Which of the following is NOT a function of the reticuloendothelial system?
a) Hematopoiesis
b) Iron storage and metabolism
c) Lipid synthesis
d) Immune defense
Answer: c) Lipid synthesis
How does the reticuloendothelial system contribute to the removal of aged and damaged red blood cells from circulation?
a) Phagocytosis by Kupffer cells in the liver and macrophages in the spleen
b) Activation of complement proteins
c) Production of antibodies
d) Release of cytokines
Answer: a) Phagocytosis by Kupffer cells in the liver and macrophages in the spleen
Which cells in the reticuloendothelial system are responsible for antigen presentation to T lymphocytes?
a) Macrophages
b) Neutrophils
c) Eosinophils
d) Basophils
Answer: a) Macrophages
What is the function of reticular fibers in the reticuloendothelial system?
a) Synthesis of antibodies
b) Formation of stromal framework for hematopoiesis
c) Phagocytosis of pathogens
d) Regulation of iron metabolism
Answer: b) Formation of stromal framework for hematopoiesis
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Key functions of the reticuloendothelial system include:
- Phagocytosis: Macrophages and dendritic cells within the RES are specialized in engulfing and digesting foreign particles, such as bacteria, viruses, cellular debris, and other harmful substances. This process helps protect the body against infections and removes potentially harmful materials.
- Immune Response: Cells of the RES play a vital role in initiating and regulating immune responses. Dendritic cells are particularly important in capturing antigens (foreign substances) and presenting them to other immune cells, such as T cells and B cells, to trigger specific immune responses.
- Filtration: Organs like the spleen and liver contain specialized structures that filter the blood, removing old or damaged red blood cells, pathogens, and other particles. This filtration process helps maintain the quality of the circulating blood and eliminates potential threats to the body.
- Storage and Recycling: The spleen and liver store blood components, such as red blood cells and platelets, and release them into circulation as needed. They also play a role in recycling components of old or damaged cells for reuse.
- Hematopoiesis: The bone marrow, a component of the RES, is responsible for the production of blood cells, including red blood cells, white blood cells, and platelets, through a process called hematopoiesis.
