Communication
by synapses chemical
Drugs and the nervous system
IMost drugs thot affect the nervous system affect the transmission
erve impulses across synapses n
I Excitatory drugs
stimulate the nervous system by creating more action
potential
2 Inhibitory drugs
inhibit the nervous system by reducing the number of action
potentials produced
If a drug is taken continually the synopses may adapt
e.g if a drug blocks receptor at 2
synapses new receptors
㜷 補
m e up for the ones not in use
may be made to
This means more of the drug has to be token to produce the
same effect TOLERANCE TO THE DRUG
賴ncy
Depǖd on the drug occurs when as a result of changes
to the CNS the individual cannot monoge without the drug
Agonists And Antagonists
binding to the receptors for the neurotransmitter on the post synop
membrane
I Agonist binds to the receptor and activates it just like normal
neurotransmitter
2 Antagonist binds to the receptor but doesn't activate it it
just blocks out the normal neurotransmitter
by synapses chemical
Drugs and the nervous system
IMost drugs thot affect the nervous system affect the transmission
erve impulses across synapses n
I Excitatory drugs
stimulate the nervous system by creating more action
potential
2 Inhibitory drugs
inhibit the nervous system by reducing the number of action
potentials produced
If a drug is taken continually the synopses may adapt
e.g if a drug blocks receptor at 2
synapses new receptors
㜷 補
m e up for the ones not in use
may be made to
This means more of the drug has to be token to produce the
same effect TOLERANCE TO THE DRUG
賴ncy
Depǖd on the drug occurs when as a result of changes
to the CNS the individual cannot monoge without the drug
Agonists And Antagonists
binding to the receptors for the neurotransmitter on the post synop
membrane
I Agonist binds to the receptor and activates it just like normal
neurotransmitter
2 Antagonist binds to the receptor but doesn't activate it it
just blocks out the normal neurotransmitter
