Synaptic transmission

• 1. Info is passed down axon as an action potential
• 2. once action potential reaches the end of an axon it needs to be transferred to another neurone or tissue by crossing the synaptic cleft
• 3. at the end of the neurone are synaptic vesicles which contain neurotransmitters
• 4. the electrical impulse carries signals across the synaptic gape, they bind to the receptor sites on post-synaptic cell which them becomes activated
• you cannot transmit backwards because the presynaptic transmission does not have receptors so cannot transmit the action potential back across synaptic cleft
• summation occurs after synaptic transmission