the process of synaptic transmission

Question 1

outline the effects of an excitatory neurotransmitter

Answer 1

• increase positive charge in post-synaptic neurone
• increases the chance of another action potential to fire and continue to be transmitted

Question 2

outline the effects of an inhibitory neurotransmitter

Answer 2

• increases negative charge in post-synaptic neurone
• decreases chance of another action potential and slows down or stops messages being transmitted

Question 3

outline the process of electrical transmission

Answer 3

• inside of cell negatively charged when neurone in state of rest
• when activated by stimulus inside of cell becomes positively charged, generating an action potential
• creates as electrical impulse that travels down axon towards terminal

Question 4

outline the process of a synaptic transmission

Answer 4

• AP travels down pre-synaptic neurone
• AP reaches terminal and vesicles release NT
• NT travel out of neurone, across synaptic cleft in receptors on post-synaptic neurone
• chemical message converted back into electrical impulse and process starts again

Question 5

outline the effect of SSRI’s and the re uptake

Answer 5

• type of antidepressant drug
• inhibit re uptake of serotonin from pre-synaptic neurone
• serotonin NT stay in synaptic cleft for longer, having a greater effect
• persons mood remains stable, calm and regulated for longer, fighting the symptoms of depression