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Summary - inhibition at synapses

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  • Course
  • Component 3
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  • WJEC

These notes will definitely help a level students who’s studying biology. It can be used as a last minute revision booster before the exam and helps you get everything you need for the exam!

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Document information

  • April 26, 2024
  • 3
  • 2023/2024
  • Summary

Subjects

  • key points
  • last minute revision
  • biology booster

Written for

  • A/AS Level
  • WJEC
  • Biology
  • Component 3
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Content preview

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

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