40
nodes Of
↓&
resting >Natout/2kt in -
E
depolarisation only
J
-
raviner
-
e
-
- occurs
↓-
-
---
to kt
O
-
Leakey Axon
at nodes
allowing
N
of raviner
Schwann
the impulse to 'jump'
depolarisation
- 40
Threshold
-
Nat open cells
- Isaltatory
-
-
-
+
+ conduction(
-
68
-
k" closed +
+
+
-
Propagation
repolarisation -
Nat closed
Nat
& "It
#
wa
& -
↳Open refractory period
propagation direction
> ensures is
only
ane
i
Nat
↳
& hyperpolarisation-k"closes
III 1 produces discrete impulses
·
zist
limits
·
strength of an impulse
·
action potential arrives
e
Spatial summation Temporal summation
↑
Ca+ channels open vesicles
causing
·
-several
presynaptic
-
several impulses from
to release neurotransmitter
E neurotransmitter binds with receptors
neurons contribute to a
single presynaptic
/Neurotransmittera
⑳ O
·
· reach a threshold neurone to build up
a
C
·
-
-
-
opening Nat channels neurotransmitter
L- U
-
O...
I
I
presynaptic
membrane
·
neurotransmitter broken down by an
↓ G &N
&
I M v
/
-- Y ↑
:
on nd
&
M
enzy da
o
= synaptic
O
Deft
Nat
&- 11-I 1"Il
-
-
6 postsynaptic
membrane
stretch-mediated Nat channels open when
Agonists <
drugs that stimulate
pressure applied causing depolarisation of
Antagonists ,
drugs that inhibit the neuron
nodes Of
↓&
resting >Natout/2kt in -
E
depolarisation only
J
-
raviner
-
e
-
- occurs
↓-
-
---
to kt
O
-
Leakey Axon
at nodes
allowing
N
of raviner
Schwann
the impulse to 'jump'
depolarisation
- 40
Threshold
-
Nat open cells
- Isaltatory
-
-
-
+
+ conduction(
-
68
-
k" closed +
+
+
-
Propagation
repolarisation -
Nat closed
Nat
& "It
#
wa
& -
↳Open refractory period
propagation direction
> ensures is
only
ane
i
Nat
↳
& hyperpolarisation-k"closes
III 1 produces discrete impulses
·
zist
limits
·
strength of an impulse
·
action potential arrives
e
Spatial summation Temporal summation
↑
Ca+ channels open vesicles
causing
·
-several
presynaptic
-
several impulses from
to release neurotransmitter
E neurotransmitter binds with receptors
neurons contribute to a
single presynaptic
/Neurotransmittera
⑳ O
·
· reach a threshold neurone to build up
a
C
·
-
-
-
opening Nat channels neurotransmitter
L- U
-
O...
I
I
presynaptic
membrane
·
neurotransmitter broken down by an
↓ G &N
&
I M v
/
-- Y ↑
:
on nd
&
M
enzy da
o
= synaptic
O
Deft
Nat
&- 11-I 1"Il
-
-
6 postsynaptic
membrane
stretch-mediated Nat channels open when
Agonists <
drugs that stimulate
pressure applied causing depolarisation of
Antagonists ,
drugs that inhibit the neuron
