MCQ on WBC: Types and Functions
Frequently Asked MCQ quiz on the WBC: Types and Functions Questions with Answers – MCQ Quiz for Competitive Exam Preparation – These questions given will be useful for competitive exams preparation.
“WBC” typically stands for “White Blood Cell.” White blood cells are an essential part of the immune system and play a crucial role in defending the body against infections and foreign invaders. They are produced in the bone marrow and circulate in the bloodstream, where they can detect and destroy pathogens such as bacteria, viruses, and fungi. An abnormal WBC count can indicate various health conditions, including infections, inflammatory diseases, autoimmune disorders, and certain types of leukemia.
What is the primary function of white blood cells (WBCs)?
a) Oxygen transport
b) Immune defense
c) Blood clotting
d) pH regulation
Answer: b) Immune defense
What is another name for white blood cells?
a) Leukocytes
b) Erythrocytes
c) Thrombocytes
d) Granulocytes
Answer: a) Leukocytes
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Which of the following is not a type of white blood cell?
a) Neutrophils
b) Lymphocytes
c) Monocytes
d) Thrombocytes
Answer: d) Thrombocytes
Which type of white blood cell is the most abundant in the bloodstream?
a) Neutrophils
b) Lymphocytes
c) Monocytes
d) Eosinophils
Answer: a) Neutrophils
What is the primary function of neutrophils?
a) Phagocytosis
b) Antibody production
c) Histamine release
d) Allergic reactions
Answer: a) Phagocytosis
Which type of white blood cell plays a crucial role in antibody production?
a) Neutrophils
b) Lymphocytes
c) Monocytes
d) Eosinophils
Answer: b) Lymphocytes
Which of the following is a characteristic of eosinophils?
a) Phagocytosis of pathogens
b) Release of histamine
c) Allergic reactions
d) Production of antibodies
Answer: c) Allergic reactions
What is the function of basophils in the immune system?
a) Phagocytosis
b) Antibody production
c) Release of histamine
d) Removal of damaged cells
Answer: c) Release of histamine
Which type of white blood cell is known for its role in allergic reactions and parasitic infections?
a) Neutrophils
b) Lymphocytes
c) Monocytes
d) Eosinophils
Answer: d) Eosinophils
What is the primary function of monocytes?
a) Phagocytosis
b) Antibody production
c) Histamine release
d) Blood clotting
Answer: a) Phagocytosis
Which type of white blood cell is involved in the formation of pus during infections?
a) Neutrophils
b) Lymphocytes
c) Monocytes
d) Eosinophils
Answer: a) Neutrophils
What is the role of dendritic cells in the immune system?
a) Phagocytosis
b) Antigen presentation
c) Histamine release
d) Antibody production
Answer: b) Antigen presentation
Which type of white blood cell is responsible for antigen presentation to other immune cells?
a) Neutrophils
b) Lymphocytes
c) Monocytes
d) Dendritic cells
Answer: d) Dendritic cells
What is the primary function of natural killer (NK) cells?
a) Phagocytosis
b) Antibody production
c) Killing infected cells and tumor cells
d) Allergic reactions
Answer: c) Killing infected cells and tumor cells
Which of the following is NOT a granulocyte?
a) Neutrophils
b) Eosinophils
c) Monocytes
d) Basophils
Answer: c) Monocytes
Which type of white blood cell is responsible for secreting cytokines to regulate immune responses?
a) Neutrophils
b) Lymphocytes
c) Monocytes
d) Eosinophils
Answer: c) Monocytes
What is the primary function of B lymphocytes (B cells)?
a) Phagocytosis
b) Killing infected cells
c) Antibody production
d) Allergic reactions
Answer: c) Antibody production
Which of the following white blood cells is NOT involved in adaptive immunity?
a) Neutrophils
b) T lymphocytes (T cells)
c) B lymphocytes (B cells)
d) Dendritic cells
Answer: a) Neutrophils
Which type of white blood cell matures in the thymus gland?
a) Neutrophils
b) B lymphocytes (B cells)
c) T lymphocytes (T cells)
d) Eosinophils
Answer: c) T lymphocytes (T cells)
What is the primary function of T lymphocytes (T cells)?
a) Phagocytosis
b) Antibody production
c) Direct killing of infected cells
d) Histamine release
Answer: c) Direct killing of infected cells
Which of the following white blood cells is responsible for the secondary immune response upon re-exposure to an antigen?
a) Neutrophils
b) Memory B cells
c) Memory T cells
d) Dendritic cells
Answer: c) Memory T cells
What is the primary function of memory B cells?
a) Phagocytosis
b) Direct killing of infected cells
c) Antibody production upon re-exposure to an antigen
d) Histamine release
Answer: c) Antibody production upon re-exposure to an antigen
Which type of white blood cell plays a critical role in coordinating the immune response?
a) Neutrophils
b) Macrophages
c) Helper T cells (CD4+)
d) Basophils
Answer: c) Helper T cells (CD4+)
What is the primary function of regulatory T cells (Tregs)?
a) Direct killing of infected cells
b) Promotion of allergic reactions
c) Suppression of excessive immune responses
d) Phagocytosis
Answer: c) Suppression of excessive immune responses
Which white blood cell type releases chemical mediators such as cytokines to regulate immune responses?
a) Neutrophils
b) Macrophages
c) Eosinophils
d) Basophils
Answer: b) Macrophages
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