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Neuron receives a series of stimuli whose effect is excitatory but subthreshold?
Wiki User
∙ 13y ago
Then it does nothing unless the stimuli arrive at the same time to be above the threshold. Or the stimuli may undergo temporal summation (with buildup of neurotransmitters in the synapse), where their effects add up over time to be above the threshold.
Wiki User
∙ 13y ago
If a neuron receives a series of stimuli that have an excitatory effect but do not reach the threshold for action potential initiation, the neuron will not fire. This is because the individual stimuli do not generate a strong enough depolarization to reach the threshold. However, if enough subthreshold stimuli are received in a short period of time, they can summate and reach the threshold, generating an action potential.
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A neuron that is excited to subthreshold is said to be?
It has become activated/stimulated.
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 part is a neuron receives signals?
dendrite
What determines if an action potential is initiated in the postsynaptic neuron?
Every time neurotransmitter is released from the presynaptic neuron it generates an excitatory post synaptic potential(EPSP) in the postsynaptic neuron. When the EPSP is greater than the threshold for excitation an action potential is generated.
What is the part of the neuron that normally receives stimuli called?
A Dendrite
Branched region of the neuron which receives stimuli from the surrounding environment?
dendrite
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.
A neuron that is excited to subthreshold is said to be?
It has become activated/stimulated.
What statements characterizes an excitatory neuron?
It sends an impulse back to the cell body of the neuron
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.
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.
The part of the neuron that normally receives stimuli is called?
The Synaptic signals from other neurons are received by the neuron's soma and dendrites. Synapse's happens when contact is made by one neuron's axon and is received by another neuron's dendrite and soma. The synaptic signaling procedure is vital to positive neuron function.
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.
