Neurons And Synaptic Transmission
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the nervous and synaptic transmission : The nervous system
Consists of billion of nerves cells (neurons) which receive and pass info Miniscule (10 billion in the brain alone) Spaced out with little gaps called the synapse Synapse carries chemical message from the post synaptic neuron to the pre-synaptic neuron in form of NTs NTs-dopamine ,serotonin and GABA
What are the structure of a neuron
Dendrities sensory neuron Axon Cell body -relay neuron Cell body Motor neuron Axon
What does a sensory neuron do
Carries nerve impulses from the sensory receptors (senses) to the spinal cord and brain
What does a motor neuron do
Refers to neurons which conduct signals from the CNS to effector organs:muscle Form synapses with muscles and control dendrities and their contraction
what does a relay neuron do
Common type of neuron in the CNS Allow sensory and motor neurons to communicate with the spinal cord and brain
What are example of excitatory neurotransmitters
Acteylcholine Noradrenaline
What effect does the excitatory NTs play on the neuron
Increases the likelihood that an excitatory signal is given off
What is the name for the effect
Excitatory post synaptic potential (EPSP)
What is an example of inhibitory NTs
Serotonin GABA
What effect does the inhibitory NTs play on the neuron
Decreases the likelihood of a neuron firing
What is the name for the effect
Inhibitory post synaptic potential (IPSP)