24 Questions
What is the main function of leukocytes in the body?
To defend the body against foreign invaders
Which type of hematopoietic cells differentiate into terminally differentiated cells?
Stem cells
What are the three main types of hematopoietic cells?
Stem cells, progenitor cells, and precursor cells
Which type of leukocyte spends very little time in peripheral blood before migrating to tissues?
Eosinophils
What is the most common type of circulatory leukocyte?
Neutrophils
What type of leukocyte is responsible for cell-mediated immunity?
T lymphocytes
Which type of leukocyte is associated with allergic reactions?
Eosinophils
Which type of leukocyte has large purple-black granules containing histamine and heparin?
Basophils
What is the function of monocytes in the body?
To function as phagocytes
Which type of hematopoietic cell differentiates into neutrophils?
Myeloblasts
What is the shape of a neutrophil nucleus?
Segmented
Which type of leukocyte is responsible for humoral immunity?
B lymphocytes
What is the main function of leukocytes in the body?
To defend the body against foreign invaders
Where do leukocytes develop from?
The bone marrow
What are the three main types of hematopoietic cells?
Stem cells, progenitor cells, and precursor cells
Which leukocyte is responsible for ingesting and killing microorganisms?
Monocytes
What is the nucleus shape of neutrophils?
Segmented with two to four lobes
Which leukocyte is associated with allergic reactions, parasite infection, and chronic inflammation?
Eosinophils
What are the two classifications of lymphocytes?
B and T lymphocytes
Which leukocyte constitutes less than 1% of total leukocytes and contains histamine and heparin?
Basophils
What is the function of myeloblasts?
To differentiate into neutrophils
Which leukocyte spends only a few hours in the peripheral blood before migrating to tissues?
Eosinophils
What is the percentage of neutrophils in circulatory leukocytes?
40-60%
What influences stem cells to mature into terminally differentiated cells?
Hematopoietic growth factors
Study Notes
Overview of Leukocytes and their Types
- Leukocytes develop from pluripotential stem cells in the bone marrow.
- Hematopoietic growth factors influence stem cells to mature into terminally differentiated cells.
- Leukocytes circulate for only a few hours in the peripheral blood before migrating to tissues.
- Leukocytes defend the body against foreign invaders and are attracted to sites of inflammation, infection, or tissue injury by chemoattractants.
- There are three main types of hematopoietic cells: stem cells, progenitor cells, and precursor cells.
- Myeloblasts differentiate into promyelocytes, myelocytes, metamyelocytes, and finally, neutrophils.
- The five types of human leukocytes are neutrophils, lymphocytes, monocytes, eosinophils, and basophils.
- Neutrophils constitute 40-60% of circulatory leukocytes and have a segmented nucleus with two to four lobes.
- Eosinophils spend very little time in peripheral blood before migrating to tissues and are associated with allergic reactions, parasite infection, and chronic inflammation.
- Basophils constitute less than 1% of total leukocytes, have a bilobed nucleus, and large purple-black granules containing histamine and heparin.
- Monocytes are the largest cells in peripheral blood and function as phagocytes, ingesting and killing microorganisms.
- Lymphocytes are classified as T and B lymphocytes and are responsible for cell-mediated and humoral immunity, respectively.
Test your knowledge of leukocytes with this informative quiz! From stem cells to the five types of human leukocytes, this quiz covers it all. See if you can identify the different types and understand their roles in defending the body against foreign invaders. With questions about differentiation, circulation, and function, this quiz is perfect for students or anyone interested in the fascinating world of leukocytes.
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