Summary

Summary Nervous System - IEB Grade 11 Life Sciences

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Course
Life Sciences

Institution
11th Grade

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Uploaded on January 2, 2025
Number of pages 14
Written in 2022/2023
Type Summary

life sciences nervous system ieb

Institution 11th Grade
Course Life Sciences
Schooljaar 200

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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