Process Of Synaptic Transmission

Question 1

What is a neurotransmitter

Answer 1

Chemical messengers within brain

Transmits information from one nueron to another so that person performes an action

Question 2

Process of synaptic transmission

Answer 2

Begins in pre synaptic nueron action potentials are sent down axon until they reach pre synaptic terminal

Causes neurotransmitters stored in vesicles and only located in pre synaptic neurone to be released into symapse

Question 3

Process of synaptic transmission

Answer 3

Neurotransmitters diffuse across synapse form high to low concentration

Then bind with specific reception sites only present in post synaptic nueron

Question 4

Process of ST

Answer 4

Next neurone ready to fire an impulse depending on whether nuerotranmitters has an excitory or inhibitory effect

Neurotransmitters are recycled to be stored in pre synaptic neurone in a process called re uptake

Question 5

Excitatory neurotransmitter e.g Adrenaline

Answer 5

When excitatory NTM binds to post synaptic receptors , post synaptic cell (next neurone) becomes positively charged

This makes it more likely post synaptic cell will fire so impulse will travel down axon

Increases brain activity in CNS

Question 6

Inhibitory neurotransmitters r.g serotonin

Answer 6

When inhibitory NTM binds to post synaptic receptors , the post synaptic cell (next nueron) becomes negatively charged

Prevents or reduces likelihood post synaptic cell will fire

Decreases Bain activity in CNS

Question 7

Summation

Answer 7

Occurs when excitatory and inhibitory influences are added together

If overall effect is mainly Inhibitory reduces/ inhibits likelihood neurone will fire impulse down post synaptic neurone

If mainly excitatory impulse will fire impulse down post synaptic neurone