Leucopoiesis & Thrombopoiesis
Leucopoiesis White blood Cells and their functions Classification of White blood cells Thrombopoiesis Haemostasis function of Platelets Blood Groups and Transfusion
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Question 1
What is the primary function of white blood cells (WBCs)?
Explanation
White blood cells are primarily responsible for fighting infections and protecting the body against pathogens.
Question 2
Which of the following is NOT a type of white blood cell?
Explanation
Thrombocytes, also known as platelets, are not white blood cells; they are involved in blood clotting.
Question 3
What is leucopoiesis?
Explanation
Leucopoiesis is the process of formation of white blood cells in the bone marrow.
Question 4
What is the main purpose of thrombopoiesis?
Explanation
Thrombopoiesis is the process through which platelets are produced from megakaryocytes in the bone marrow.
Question 5
Which component of blood is primarily responsible for hemostasis?
Explanation
Platelets play a critical role in the process of hemostasis, which involves blood clotting to prevent bleeding.
Question 6
How are blood groups classified?
Explanation
Blood groups are classified based on the presence or absence of specific antigens on the surface of red blood cells.
Question 7
Which blood group is considered the universal donor?
Explanation
Blood type O negative is known as the universal donor because it does not have A or B antigens on the red blood cells.
Question 8
In the context of blood transfusions, what is a potential consequence of mismatched blood types?
Explanation
A mismatched blood type can lead to a transfusion reaction, which can cause serious health complications.
Question 9
Which type of white blood cell is primarily involved in the adaptive immune response?
Explanation
Lymphocytes, including T cells and B cells, are crucial for the adaptive immune response.
Question 10
What is the approximate lifespan of most white blood cells?
Explanation
Most types of white blood cells have a lifespan of several days, but this can vary based on their type and the body's needs.
Question 11
What type of blood component is involved in the initial response to a cut?
Explanation
Platelets are the first responders to a cut; they aggregate to form a plug that helps stop bleeding.
Question 12
Which type of white blood cell is responsible for producing antibodies?
Explanation
B cells are responsible for producing antibodies that help identify and neutralize pathogens.
Question 13
What is the function of eosinophils?
Explanation
Eosinophils are particularly effective against multi-cellular parasites and are also involved in allergic reactions.
Question 14
Which blood group can receive blood from all other groups?
Explanation
Blood group AB can accept blood from all other groups (A, B, AB, O) due to the absence of anti-A and anti-B antibodies.
Question 15
Which condition is characterized by the excessive production of white blood cells?
Explanation
Leukemia is a cancer that leads to the excessive production of immature or abnormal white blood cells.
Question 16
Which vitamin is essential for proper platelet function?
Explanation
Vitamin K is crucial for the synthesis of certain proteins required for blood clotting and platelet function.
Question 17
Which process describes the stoppage of bleeding?
Explanation
Hemostasis is the process that prevents and stops bleeding, ensuring that blood remains within the damaged blood vessels.
Question 18
What role do basophils play in the immune response?
Explanation
Basophils release histamine during allergic reactions, contributing to inflammation and immune response.
Question 19
What is the primary function of white blood cells in the human body?
Explanation
White blood cells are crucial components of the immune system, primarily responsible for fighting infections and responding to foreign substances in the body.
Question 20
Which of the following is primarily involved in the formation of blood clots?
Explanation
Platelets, derived from thrombopoiesis, are essential for blood clotting and the haemostasis function, preventing excessive bleeding during injury.