Summary CIE A-level Biology: The nervous system (A* achieved)
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Course
CIE A2 Biology
Institution
CIE A2 Biology
Book
Cambridge International AS & A Level Complete Biology
Hi everyone:)) Here are my CIE A2 level Biology topic notes for the syllabus. These notes are tailored to the A level syllabus as well as the mark scheme as if you do enough past paper questions you will see a recurring pattern with the types of questions asked about each topic. My notes include s...
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sirrcwreofnenrms
small extensions
me all
of body thot
•
subdivides to
demons
÷÷÷÷÷÷÷÷÷÷
"
nucleolus nucleus •
N
nodes of
All rentier
body nucleus
og
↳ section
nucleus mitochondria RER Schwan cell open of
-
, ,
prevents need for stream
grouped in NISSL 'S GRANULES
myelin
-
-
proteins 20h'm potential
-
associated w/ the production of
and neurotransmitters
-
insulates axon
sores
energy
-
Resting P0NM chevre AP )
impulse 21mg neuron is electrical → Potential
•
not e-
creation of a
polarised condition across the
•
↳ Ct ]
axon membrane
Kt & Not
of make
•
Active transport to an
electrical chemical gradient .
All oogooinst
[
g)
•
more 1- outside mon inside
=
Potential difference
No / K+ pump = Axon c- )
charged
-
3 Not out be outside is mo
-
2 kt in Ct )
•
2 -1kt in
3 ✗ Not out
Membrane more permeable to Kt
•
less free of Not Kt
leaking
•
movement more
,
Potential difference around -70m¥
•
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