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The information needed to explain the components, functions, jobs of all the white blood cells in the body. £4.99
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  3. PEARSON (PEARSON)
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  5. Applied Science
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  7. Unit 20

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The information needed to explain the components, functions, jobs of all the white blood cells in the body.
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Includes explanations on: Bosophil, Eosinophil, Monocytes, Dentric ells, thrombocytes, Plateletes, and Plasma

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  • May 9, 2024
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  • 2023/2024
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Function of a basophil: they defend your body from allergens, pathogens
and parasites.
 Bi- lobed nucleus
 Secrete histamines
 Type of granulocyte
 Coarse, dense, blue – black cytoplasmic granules


Defend your body against:
Basophils attack any organism they see that is unfamiliar to your body by
allergens, bacteria, fungi, viral
phagocytosis.
infections, blood clotting and
parasites. During an allergic reaction they release 2 enzymes:

Histamine Heparin
Allergic reaction symptoms like:  Enlarges your blood  An enzyme that prevents
vessels to improve blood from clotting too
- Itchy skin
blood flow quickly.
- Runny nose
 It also opens pathways
- Watery eyes
for other cells to
occur when basophil releases quickly target and
histamines. respond to the allergen




Function of an eosinophil: they attack and kill parasites and cancer cells; they also help with allergic reactions.
 Allergic responses
 Bi-lobed nucleus
 Destroy parasites and cancer cells
 Nucleus is segmented into 2 (or more) lobes connected by a barely visible thin filament
 They attack in numbers and release highly toxic proteins that help fight micro- organisms,
and parasitic infections.
Eosinophil can also cause tissue damage
when activated during allergic reactions.




Monocytes can perform phagocytosis, or they can differentiate into either a Dentric cell
or a Macrophage. This is because they both perform antigen presentation.
Antigen presentation = a process that enables T- lymphocytes to identify antigenic
epitopes on an antigen presenting cells surface.


Function of a monocyte: they release cytokines in order to signal and
recruit other cells to an area with pathogens.

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