Impulse travel-Saltatory conduction.
Rocd the PNS.
Myelinated
·
nerrow a re in
The Schwann cell the to create Schwann cell membrane to
around protect
·
wraps axon
many layers of the axon.
--
·
-
- -
+ + + m+ M
t m + +
avonEngin
-
S
/
-
/
node of ranvier
activa membrane
·
melin
sheath
prevents
-
potential
· A allows
.
action
potential
whereincanpost
.
·
y
only in
neurons
insulated
by myelin .
of that
rec tion of the
· Schwann cells prevent movement lon in axon
&
jumping from
action
one to the .
next
·
The movement of out at the mode of ranvier shows that potentials one
o As the lon of the action
potential occurs les frequently, It toko les time > -
Increased impose speed.
·
Action potentials follow an
all
impose or
nothing principle . This mean that r i ve
the of the action
potential is
always
the same,
despite the strength of stimulus.
live will be
the
·
A stronger Stimulus will would in much
bigger frequency of impurer being read
along nearon
meaning ,
the
graph
and down.
going up
+ 40
membrane potential
· socium channels close .
.
·
potassium channels open t
so our more out
Depularisation
Depolarisation
/
M
-
diam ame close .
mV
& (2
73
No innt in)
&
I on out
-
50 · Influx of Nation
increasing .
· Sodium channel
opene
· become positive
it
thats why
S
yet up point.
I
-
60
mode.
-
70 resting
Nat/ k+ purp mode
~
2 in Sort 3 k
+
2 Not out in
-
75
↓
Time
<
↳ iont more i n
COMPLETED
Grom staining practical - 19th of October 2023
4:
30pm-5: 20 pm
By leaving the burner it
-
bowen
purple ,
·
on means we
orange
, ,
↓
sterilise the
practical a re a and the air around the
petri dish whilst
opening
it , to avoid contamination .
·
It is
important to
follow General
laboratory practice
crystal violet -
> iodine >
- ethand >
-
safronin, and be mature
enough
to behave in kind manners
b OxC done I
6-Ise
dosec to avoid accidents
during practicals .
Ist the loop ethend and let burn bunden bright
Dip innoculating in it on the burner until it
glows orange .
2nd contaminated ,
.
Open carefully the bacteria plate by not exposing it fully with the air wo it can yet with
impurities in cei
and take small
sample of the bacteria
a
and
place it on the slide
microscope .
the
3rd .
-
Heat fix slide on
top of burenburner fire about three timer and let it set .
colour stains the slide and rine each stain after 60 seconds at the end add 2
drops of ethanol
by adding the
on
yeth . Start ,
rine it followed by stain afterwards
staining
with safranin rising it.
and
it
5th .
Finally let the side
dry
and
put
it on a
microscope to me the
pink and pople bacteria .
Rocd the PNS.
Myelinated
·
nerrow a re in
The Schwann cell the to create Schwann cell membrane to
around protect
·
wraps axon
many layers of the axon.
--
·
-
- -
+ + + m+ M
t m + +
avonEngin
-
S
/
-
/
node of ranvier
activa membrane
·
melin
sheath
prevents
-
potential
· A allows
.
action
potential
whereincanpost
.
·
y
only in
neurons
insulated
by myelin .
of that
rec tion of the
· Schwann cells prevent movement lon in axon
&
jumping from
action
one to the .
next
·
The movement of out at the mode of ranvier shows that potentials one
o As the lon of the action
potential occurs les frequently, It toko les time > -
Increased impose speed.
·
Action potentials follow an
all
impose or
nothing principle . This mean that r i ve
the of the action
potential is
always
the same,
despite the strength of stimulus.
live will be
the
·
A stronger Stimulus will would in much
bigger frequency of impurer being read
along nearon
meaning ,
the
graph
and down.
going up
+ 40
membrane potential
· socium channels close .
.
·
potassium channels open t
so our more out
Depularisation
Depolarisation
/
M
-
diam ame close .
mV
& (2
73
No innt in)
&
I on out
-
50 · Influx of Nation
increasing .
· Sodium channel
opene
· become positive
it
thats why
S
yet up point.
I
-
60
mode.
-
70 resting
Nat/ k+ purp mode
~
2 in Sort 3 k
+
2 Not out in
-
75
↓
Time
<
↳ iont more i n
COMPLETED
Grom staining practical - 19th of October 2023
4:
30pm-5: 20 pm
By leaving the burner it
-
bowen
purple ,
·
on means we
orange
, ,
↓
sterilise the
practical a re a and the air around the
petri dish whilst
opening
it , to avoid contamination .
·
It is
important to
follow General
laboratory practice
crystal violet -
> iodine >
- ethand >
-
safronin, and be mature
enough
to behave in kind manners
b OxC done I
6-Ise
dosec to avoid accidents
during practicals .
Ist the loop ethend and let burn bunden bright
Dip innoculating in it on the burner until it
glows orange .
2nd contaminated ,
.
Open carefully the bacteria plate by not exposing it fully with the air wo it can yet with
impurities in cei
and take small
sample of the bacteria
a
and
place it on the slide
microscope .
the
3rd .
-
Heat fix slide on
top of burenburner fire about three timer and let it set .
colour stains the slide and rine each stain after 60 seconds at the end add 2
drops of ethanol
by adding the
on
yeth . Start ,
rine it followed by stain afterwards
staining
with safranin rising it.
and
it
5th .
Finally let the side
dry
and
put
it on a
microscope to me the
pink and pople bacteria .
