Neurontransmitters

Question 1

Describe the process of synaptic transmission

Answer 1

• Electrical impulses travel along presynaptic neurone
• electrical impulse reaches synaptic vesicle to release neurotransmitter
  -these diffuse across synapse and attach to receptors on post synaptic neurone
  -Trigger achon potential - carried to dendrite of nerve cell

Question 2

How Recreational drugs change neurotransmitters in the brain

Answer 2

-Increase/decrease neurotransmitters at the synapse
-Change chemical balance
- affect how neurotransmitters reupraken or released at the synapse eg cocaine simulates or other dopamine and blocks reuptake so gives sense of euphoria

Question 3

Cocaine

Answer 3

Blocked receptors
Blocked reuptake of dopamine

I SO body stops making as much dopamine
Receptors degrade as too much dopamine coming through

Question 4

Nicotine

Answer 4

Triggers release of dopamine
- mimics neurotransmitter so can trigger receptor

Question 5

Alcohol

Answer 5

, Increases GABA
inhibits neurotransmission of different neurotransmitters, in different areas of the brain
Inhibits the dopamine inhibitor so therefore dopamine increase
The same for serotonin