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It sends an impulse back to the cell body of the neuron
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∙ 10y ago
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What is the action of dopamine on the postsynaptic membrane?
All neurotransmitters have an effect on the post synaptic membrane of either inhibition or excitation. Dopamine is an Excitatory NT so if a Excitatory Neuron meets with another Excitatory Neuron it creates Excitation. However if it meets with an Inhibitory Neuron Dopamine and the other Excitatory NT's wll only create Inhibition. Only GABA and Glycine are considered Inhhibitory NTransmitters.
What is the summing up of the excitatory and inhibitory signals by a neuron called?
Integration
What is the summing up of excitatory and inhibitory signals in a neuron called?
Integration
What happens when neurotransmitters communicate an excitatory message to the postsynaptic neuron?
When neurotransmitters communicate an inhibitory message to the postsynaptic neuron:
What cause neuron to fire?
The neuron adds up all the excitatory and inhibitory inputs and fires when they reach its threshold of excitation.
What determines whether the response of a receiving neuron is excitatory or inhibitory?
The type of neurotransmitter.
10 letters. What is a kind of message that increases the likelihood that a neuron will activate?
excitatory message
Neurotransmitters find their way to and subsequently trigger firing of that neuron?
Excitatory neurotransmitter
What is mean by the all or none response of a neuron?
The simplest sense, the all-or-none principle of neuronal firing means that a neuron will either fire or it won't, there is no "half" firing. When a neuron receives excitatory input.
How does synaptic integration determine if a nerve impulse is generated or not generated in a neuron?
Neurons integrate incoming signals and sum up the excitatory and inhibitory signals, integration. The excitatory neurotransmitter produces a potential change (signal). This signal pushes the neuron closer to an action potential. If the neuron receives excitatory signals chances are that the axon will transmit a nerve impulse. The inhibitory neurotransmitter produces signals that drive neurons further from an action potential. If neurons receive both the inhibitory and the excitatory signals the summing of the signals may prohibit the axon from firing.
Which one of these statements best characterizes the contingency approach?
A.
A neuron has hundreds of axonknobs impinging on it and most of the axonal knobs are firing but why does the neuron not transmit an impulse?
Probably because some portion of those synapses are inhibitory as opposed to excitatory.
