work done by student

1. - NARGIS
and
BHAVISHYA
SUBMITED
BY

3. A neuron or nerve cell
is
an electrically excitabl
e cell that processes
and transmits
information through
electrical and chemical
signals.

4. CELL BODY
DENDRITES
AXON

5. A cell body contain
cytoplasm with
typical cell
organelle and
certain granular
bodies called nissl’s
granules.

6. Short fiber which
branch repeatedly
and project out of
the cell body also
contain nissl’s
granules and are
called dendrites

7. AXON
 Axon is a
long fiber
the distal
end of
which is
branched .

10. SYNAPSE - A nerve inpulseis
transmittde from one to
another through junction
called synapse.

11. SYNAPTIC CLEFT- A
synapse is form by the
membranes of the pre –
synaptic neuron and
post synaptic neuron
which may or may not
be seprated by a gap
called synaptic cleft.

12.  Transmission of nerve impulse across a
synapse by chemical means was
discovered by SIR HENRY HALLET
DALE in 1936.

13. The sequence of events
that lead to postsynaptic
changes is as follows:

14. 3. Ca2+ enters the presynaptic cell
because its concentration is greater
outside the cell than inside.
2.The local depolarization causes
Ca2+ channels to open.
1.The action potential signal arrives at the
axon terminal (the bouton).
4. The Ca2+, by binding with calmodulin,
causes vesicles filled with
neurotransmitter to migrate towards the
presynaptic membrane.

15. 6. The presynaptic membrane and vesicle
now forms a continuous membrane, so
that the neurotransmitter is released into
the synaptic cleft. This process is
called exocytosis.
7. The neurotransmitter diffuses through
the synaptic cleft and binds with receptor
channel membranes that are located in
both presynaptic and postsynaptic
membranes.
8. The time period from neurotransmitter
release to receptor channel binding is less
than a millionth of a second.

18. CONTROL AND
CORDINATION
SENSORY INPUT
INTEGRATION

21. Bain is a central
information
processing
organ of our
body and act as
command and
control system
PARIETAL LOBE
FRONTAL LOBE
TEMPORAL LOBE
CEREBELLUM
OCCIPITAL
LOBE

22.  Brain is covered by cranial meanings. It
consist of three layer.
1. Dura mater-Outer layer
2. Arachnoid- Thin middle layer
3. Pia mater - Inner layer

26. • CEREBRUM:
• It form the
largest part of
the brain.it’s
hemisphere
connected by
corpus callosum
• OLFACTOFY
LOBES
• Fully covered
by cerebrun
each
olfactory
lobes consist
of olfactory
bulb and
olfactory
trap
• DIENCEPHAL
ON
• It consist of
hypothalamus
and
epithalamus

28. A canal called
the cerebrul
aqueduct
passes
through the
mid brain
CEREBRAL
AQUEDUCT
The dorsal
portion of
minbrain
consist of
four round
lobes called
corpora
quardigemina.
CORPORA
QUADRI-
GEMINA

30. HIND
BRAIN
CEREBRLLUM
MEDULLA
PONS

31. CEREBELLUM
It lies below
the posterior
portion of the
cerebral
hemisphere
MEDULLA
It is the
lowermost
part of the
brain . It is
conical in
form
PONS
It is an oval
mass and lie
above
medulla it
join medulla
with higher
brain

32. The nervous system receives
information about the
changes in the external
environment and within the
body and conduct necessary
instruction to various parts
of the body for coordinating
their activities in the light
of the information about the
changes.