Download Nervous system

Discuss this with your table buddy
(think-share-Pair)



“Our nervous system is critical
to our survival in the
environment” .
Why is this true or not true?
Submit at least three reasons
why you agree or disagree.
The answer to the Puzzle.
(Exchange book write check by…)
DOWN
ACROSS
1.
2.
4.
5.
6.
8.
Brainstem
2. Cerebellum
3. Medulla
7. neuron
Cerebrum
dendrite
spinal cord
axon
Nucleus
The brain sample for Discussion
question A
C
A
B
The nervous System
To be used for better understanding
of the system.
Nervous System
By the end of the lesson you should be able to
 Describe the functions of the nervous
system
 Identify the parts and structures that make
up the nervous system
 Understand the transmission of impulses
from senses to central nervous system and
back to muscles.
3 Functions of the Nervous
System
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
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Receives information from the outside
environment and inside your body
Responds to information
(stimulus
response)
Maintains homeostasis
The Parts of the Nervous
system
http://hes.ucfsd.org/gclaypo/nervous
sys.html
What is the basic structure of
the Nervous system?
Neurons? Or Nerve cell?
Did you Say neurons? Or Nerve cell?
Your are correct! A neuron is a nerve
cell which is the basic structure that
carries electrical message or
impulse in the nervous system.
Watch the
impulse
travelling
along
Basic nerve cell structure
Axon carries message
Away from cell body
has a cell body
Den
drite
s
3 main types of nerve cells
Nucleus
sensory
neurone
relay
neurone
motor
neurone
Lets now compare and
contrast the 3 types of
neurons
Sensory neurons
Carries impulses from receptors e.g. pain
receptors in skin to the Central Nervous System (
brain or spinal cord)
Relay neuron
Carries impulses from sensory nerves to
motor nerves. It is like the middle man
Motor neuron
Carries impulses from CNS to the muscle to
cause movement
What else can we find in the
nervous system?
The following are also parts of
the nervous system
1.
2.
3.
Nerve
Brain
Spinal cord
The nerves

A nerve is a collection of neurons
which transmit impulses throughout
the body
The brain. It is an organ. It is the
central control of the NS
The left side of the
brain controls the
right side of the body
The right side of the
brain controls the left
side of the body
Functions of Parts of the Brain
Parts
Cerebrum
Cerebellum
Brain stem
Function
Works with the Cerebellum
to coordinate movement.
Help with memory learning,
thought intelligence,
reasoning
Co-ordinate muscular
movement posture and
balance
Controls involuntary actions such
as breathing sneezing, swallowing
coughing vomiting
The next part of the Nervous
system is the spinal cord
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It is connected to the
brain stem and is
responsible for
conducting impulse to
and from the brain
It controls such
simple reflexes such
as knee jerking reflex
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How is the nervous system like a
communication and alarm system
for the body?
What did you learn?

After reviewing slide web page
explain in your own words how
nervous system works.