PSL201Y1 Lecture Notes - Lecture 5: Axon Hillock, Axon Terminal, Neuroglia
Document Summary
Synapse: functional association of a neuron with another neuron,or effector organs (muscle or gland) Chemical synapses involve release of neurotransmitters after generation and conduction of action potential to the axon terminal still have depolarizing currents generated at axon terminal ,but it doesn"t travel backward, neurotransmitters are released at the terminal. Vesicles will be released into the synapse these contain the neurotransmitters the neurotransmitters bind to the post-synaptic neuron and eventually starts events that may or may not trigger an action potential. At synapse we get a release of neurotransmitter and this information is past through this next cell (post synaptic cell) Components of a synapse: presynaptic neuron (membrane), postsynaptic neuron (membrane), synaptic cleft (space between pre and post synaptic neuron) Neuron-to-neuron synapse most synaptic neuron axon terminal forms a synapse with dendrites of post synaptic neuron this is called axodendritic synapse (receptive fields on dendrites) if synaptic neurons, axon terminals form a synapse with soma (called axosomatic )
