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nervous system (neurontransmitter (How does it influenced by drug (where…
nervous system
neurontransmitter
after the signal is sent
the NT will either reabsorp
by the receiving neuron
or enzyme deactivization
How does it influenced by drug
agonist
mimic the action of nuerotransmitter; enhance NT activity
antagonist
inhibit NT activity
where does it act on
presynaptic neuron
facilitate/inhibit release of NT
synaptic cleft
facilitate/block reabsorp of reactivization of NT
post synaptic neuron
facilitate/block the effect of NT
what is it and how is it formed?
when action potential reaches the axon terminal
release chemical package that diffuse among the cell and influence the action potential
it produced from the terminal of an axon terminal to pass through the synaptic cleft to the other cell
inhibitory synapse
open either chloride or potasium channel
help with replorization
decrease action potential
excitory synapse
open soium channel and help with deplorization
increase action potential
it is the chemical package that released when action potential reaches the axon terminal
move between cells to help with the action potential comes to the receiving nuerons
neuron
different kinds of neurons
sensory neuron
collect the sensory stimulus from the body to the central nervous system
interneuron
within the Central Nervous system
transmit information between neurons :
motor neuron
send the information from the central nervous system to musclar movement
rate of impulse conduction
depends on
myelinated
faster
radius large
faster
common structure of neuron
cell body
contains cell neurons
basic machinery functio
dendrite
receive input for the neurons
axon
carry message to other neurons
action potential
how it works
resting stage
receive stimulus
stimulus needs to cause the cell has 55mv
then the sodium channel will open
sodium ions will rush back into the cell
as soon as the deplorization occur, replorization occur too
refroctory stage
1 more item...
potasium channel remains open
potasium ions pushed out
this is called "depolarization"
the peak is +40mv
resting stage: the cell has negative 70 mv. (potasium chanell open; sodium chanell closed)
principle
all or nothing
result
with each action potential
some potasium ions are moved out
some sodium ions moves in
this is why the sodium-potasium pump
bring potasium back and remove sodieum out
