The diagram below shows a synapse.
Identify the structures labeled A, B and C.
The structures labelled D are involved in the transmission across the synapse.
Identify the structure labelled D and describe its role in transmission across a cholinergic synapse. Do not include details on the breakdown of acetylcholine in your answer.
Dopamine is a neurotransmitter released in some synapses in the brain. The transmission of dopamine is similar to that of acetylcholine. Dopamine has a role in numerous processes in the brain including pain relief. Dopamine is transported across the presynaptic membrane through carrier protein called transporters.
The diagram shows the structures of molecules of dopamine and cocaine.
Explain why cocaine is able to bind to dopamine transporters.
Dopamine is a hormone and is released at synapses in parts of the brain where pleasure is perceived.
The diagram below summarises how dopamine and cocaine interact in the transmission across the synapse.
Use information from both diagrams to explain how the use of cocaine can result in feelings of pleasure.
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