Synapses occur at the junctions

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Presentation transcript:

Synapses occur at the junctions Neurones Neuronal cell bodies psychlotron.org.uk Axons Source: science photo library Synapses occur at the junctions

Synapses Neurones transmit signals electrically along their axons The synapses (junctions between neurones) transmit signals chemically psychlotron.org.uk

Vesicles filled with neurotransmitter Synapse Vesicles filled with neurotransmitter psychlotron.org.uk Synaptic cleft Source: neuroscience.wustl.edu Location of receptors (post-synaptic density)

Vesicles release neurotransmitter into synaptic cleft psychlotron.org.uk Vesicles release neurotransmitter into synaptic cleft

Neurotransmitter binds to receptors & activates them psychlotron.org.uk Neurotransmitter binds to receptors & activates them

Enzymes are released to break down the neurotransmitter psychlotron.org.uk Enzymes are released to break down the neurotransmitter

Excess neurotransmitter is taken up by the pre-synaptic neurone psychlotron.org.uk Excess neurotransmitter is taken up by the pre-synaptic neurone

Vesicles are replenished with new & reused neurotransmitter psychlotron.org.uk Vesicles are replenished with new & reused neurotransmitter