PHYSL210A Lecture 5: Synapse
22 Oct 2018
School
Department
Course
Professor
Document Summary
Presynaptic site action potential causes the release of neurotransmitters into the synaptic cleft. Neurotransmitter attaches to receptors in the post synaptic site. Presynaptic site contains a lot of mitochondria release and reuptake of neurotransmitters require a lot of energy in the form of atp: presynaptic neurotransmitter release. Synaptic terminal contains neurotransmitters stored in vesicles. Influx of ca ions into the neuron because of the opening of ca ion channels causes the fusion of vesicles with the plasma membrane and neurotransmitter is released into the synaptic cleft. Ca ion channels are stimulated to open as na ion action potential occurs at the last. Schwann cell no node of ranvier at the axon terminal. Neurotransmitters bind to receptors on the post synaptic membrane. Na ion and ca ion influx and k ion efflux action potential generated in the postsynaptic neurone: motor endplate. Synapse between motor neurone and skeletal muscle fibre, the sarcolemma.
