Edexcel A-Level Psychology 9PS0
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Biological Psychology
The central nervous system and neurotransmitters
- 3 things to know
- Papers 1 and 3
Overview
Recall questions on the structure of the neuron, the synapse, excitation and inhibition, and how a signal passes between neurons.
What you need to know
Answer each one before you reveal it.
What is reuptake?
What is the cell body (soma) of a neuron?
Questions from this subtopic
Each one with the model answer underneath.
- 1
Which component of the CNS is responsible for higher cognitive functions such as thinking and memory?
Model answer
The brain.
- 2
What is a neuron?
Model answer
A neuron is the basic structural and functional unit of the nervous system, specialised for transmitting electrical and chemical signals.
- 3
What is the cell body (soma) of a neuron?
Model answer
The part of the neuron that contains the nucleus and maintains the cell's metabolic functions.
- 4
What metabolic role does the cell body of a neuron perform?
Model answer
It contains the nucleus and is responsible for maintaining the cell's metabolic functions.
- 5
What type of signal does the axon carry, and in which direction?
Model answer
The axon carries electrical impulses (action potentials) away from the cell body towards the terminal buttons.
- 6
Define neurotransmitters.
Model answer
Chemical messengers that transmit signals across the synaptic gap between neurons.
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