impulse impulses synapse neuron neurons Gaps cell sheath body neuron contains protects body material transmission cell genetic nerve myelin
Neurons
vary
in
size
but
all
share
the
same
basic
structure
:
Cell
body
(
or
soma
)
-
includes
a
nucleus
which
the
of
the
cell
Dendrites
-
branch
-
like
structures
that
protude
from
the
cell
body
.
These
carry
from
neighbouring
towards
the
.
Axon
-
carries
the
electrical
away
from
the
down
the
length
of
the
.
It
is
covered
by
a
fatty
layer
of
that
the
axon
.
in
the
axon
called
nodes
of
ranvier
speed
up
the
of
the
impulse
.
Terminal
buttons
at
the
end
of
the
axon
communicate
with
the
next
in
the
chain
across
a
gap
called
the
.