The Nervous System, Organisation of the Nervous System, Basic Functions of Synapses and Transmitter Substances
The general design of the Nervous system: The Nervous system includes both sensory and motor systems interconnected by complex integrative mechanisms neuron Soma several dendrites single axon sensory receptors sensory neuron motor response Motor response memory Function of the Central Nervous System This is based upon interactions that occur between neurons at specialised junctions called synapses synaptic terminals or synaptic boutons synaptic cleft synaptic vesicles neurotransmitter agent Chemical synapses and electrical synapses are the two most prevalent types of synapses in the brain chemical synapses presynaptic element - releases neurotransmitter agent that bind to the postsynaptic neuron - which is excited or inhibited electrical synapse gap junctions Neurotransmitter Release is Calcium Dependent voltage gated calcium channels calcium moves into the terminal Action of a Neurotransmitter is Determined by its Postsynaptic Receptor Rec