Unit 9- White Blood Cells Flashcards
White blood cells are larger than
Red blood cells
What do white blood cells have that red blood cells do not?
Nucleus
White blood cells are __________________ than RBC
Less numerous
Do you not have a definite ___________
Shape
What is the function of white blood cells?
Fights against infection
What helps white blood cells fight infection?
- phagocytic
- produces antibodies
What are the two groups of white blood cells
Granulocytes and agranulocyte
Types of granulocytes
Basophils
Neutrophil
Eosinophil
Where do granulocytes develop?
Red bone marrow
How long do granulocytes last?
They are short-lived about 12 hours
What is the most common white blood cell?
Neutrophils
Neutrophils are comprised of what percentage of the leukocytes?
54% to 62%
How many lobes does the nuclei neutrophil have?
2 to 5 lobes
Neutrophils are the first to arrive at the infection site, what do they ingest?
Ingest bacteria virus particles fungi or protozoa
Cytoplasmic granules of neutrophils are usually very _______ and faint to observe
Fine
How many lobes does eosinophils have?
They are bi-lobed. And uniform sized cytoplasmic granules
Eosinophils are comprised of only______ of the leucocytes
3%
Eosinophils job
Moderates allergic reactions and defends against parasitic worm infestation’s
Basophils are comprised less than ______ of the circulating white blood cells
1%
Basophils are __________ then other granulocytes
Smaller
Why are basophils easy to identify?
Because of their numerous granules in the cytoplasm
Basophils job
They discharge their granules containing histamine and heparin into damaged tissue spaces to promote inflammation and blood flow to damaged areas
What are the agranulocytes
Monocytes and lymphocytes
Agranulocyte Lack __________ in their cytoplasm
Granules
What percentage of circulating white blood cells are monocytes comprised of?
Comprised of 2 to 8% of circulating white blood cells
Monocytes are twice the size of….
Red blood cells
How long do monocytes live?
Travel in the blood for about a day before exiting
The migrating monocytes are big ___________
Eaters
Monocyte function
They develop into macrophages that phagocytose bacteria and degree in the tissues
Lymphocytes are easy to recognize because
They have a large nucleus that occupies most of the cell
How long do you lymphocytes live
Can live for years
What percentage of white blood cell population are lymphocytes comprised of
25% to 33% of the white blood cell population
Lymphocytes are only slightly bigger than _________________
Red blood cells
Why are natural killer cells important
They are important in cancer prevention
What are the two types of natural killer cells
B cell and
T cell
T cells job
Directly attack foreign and tumour cells
B cells job
Produce antibodies to attack foreign cells or proteins
