Resumen

Summary Unit 11: Immunity Notes

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Grado
Unit 11 - J Immunity

Institución
CIE

Hand-made digital notes and diagrams on the entirety of Immunity Topic written spec-by-spec point to ensure all content is covered Compatible with all exam boards but predominantly CIE

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Subido en 12 de julio de 2023
Número de páginas 8
Escrito en 2022/2023
Tipo Resumen

biology
a level
cie
neat
handwritten
digital
phagocytes
lymphocytes
white blood cells
disease
immunity
notes

Nivel de Estudio
A/AS Level
Editores
CIE
Tema
Biology
Curso
Unit 11 - J Immunity

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Topic 11 Immunity :

II. 1 The Immune
system
1 .

Describe the action of phagocytes (macrophages and neutrophils)

to
response
/ broad Muff of
s

✗ non-specific
pathogen↳ sinan ser of
@✗ ten of receptors

spent'

many types of receptors
✗ ↳
respond
to

Phagocytes are white blood cells that are
produced continuously in the bone marrow

stored in bone marrow , then distributed to the rest
of
the
body

J T
neutrophil
y
remove dead cells and invasive
muiooryaninus
macrophage
lymphocyte
carry
out non
specific immune response
-

ao un]
-

types of phagocyte macrophages
there two main and
are
neutrophils
:

[60-652]
Neutrophils
large numbers from
→ released in their stoves

→ short-lived cells

→ lobed nucleus
-

, ⑧
% Pathogen
Neutrophil mode
of action :

Chemotaxis
Be
Neutrophil
-

1 .

Pathogen secretes chemicals to stimulate
receptors

2 .

Phagocyte moves towards chemical snniulus

)%
: chemotaxis

Receptor for annisocy Recognition
& Attainment
3 .

Phagocyte engulfs pathogen by endocytosis of pathogen
mama

by antibody
by extending a
pseudopod

together by
this is made easier when

antibodies in a
pathogens
process
caved
are stuck

agglutination
]§ Endocytosis

]
4 .

Pathogen stoned in a vesicle Lysosomes
digestive
with

engines
S Venite
fuses lysosome
. with a which

contains
digestive enzymes that help break down the
putting
lysosome
with
fuses
venire
6.
via
Pathogen destroyed by engines and
exits an

exocytosis

Macrophages ÷÷÷) Bacteria
digested

→
layer than neutrophils
Ivied
long
→ -

cells

&
→ don't remain in the blood , move into
organs lymph nodes
travel in blood
→ as
monocytes
Mauophuge mode
of action
destroy pathogens completely
→ donor

-1 cut
pathogens up
to
display antigens of pathogen on their surface
the
→
antigen-presenting an can now be
recognised by lymphocytes

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