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Summary Nervous System - IEB Grade 11 Life Sciences $4.71
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Summary Nervous System - IEB Grade 11 Life Sciences

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These notes include in depth, detailed summaries, with visual diagrams and colour coding in the form of digital handwritten notes. They are high-yield and can be used effectively to study for all relevant tests and exams. Compiled from the textbook, class hand-outs and additional research.

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  • January 2, 2025
  • 14
  • 2022/2023
  • Summary
  • 200
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MOUNIR

often
.z

, Thwaite
spoken

enables reactions to stimuli t
surroundings
Of that exerts control Over all
2
organ systems

1



↳ other endocrine ( hormonal )
:
system system
more specific







rapid •
communicates via
signals through cells +
tiny gaps between them

↳ endocrine uses
purely chemical signals in
circulatory system =
slower



signals : combination of chemical + electrochemical signals
↳ covers
long distances
quickly
acquires info from sensory organs processes it initiates response
• → → a





response → motor function =
movement



change in
org 's physiological state




mental n e r vo u s
system


CN5






made up of brain + spinal cord

↳ responsible for
processing info .




Phaethon


meninges
Protective layers


3




dura mater
layer

outermost





tough







arachnoid mater →
middle layer


web like
-




of of connective tissue ,
• consists
layers porous


pia mater → inner layer

brain

directly covers + spinal cord




cerebrospinal fluid CCSF )

in space between pia mater + arachnoid mater



brain floats in it



acts as a cushion t shock absorber

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