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What is the threshold of a neuron and how is it similar to a row of falling dominoes?
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A neuron fires only when its membrane reaches what?
When it reaches the nerve impulse threshold, the next neuron will fire..
What stimulus below this intensity will result in no response in a neuron?
Threshold stimulus
What happens when a resting neuron's membrane depolarizes?
If it is sufficiently depolarized it will fire an action potential A depolarized neuron will successfully pass a message. If you have a polarized neuron will not be able to feel a burn, etc.
Neuron receives a series of stimuli whose effect is excitatory but subthreshold?
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.
What is a resting motor neuron expected to do?
exhibit a resting potential that is more negative than the "threshold" potential
What triggers at a point in which a neuron will fire?
Threshold
A neuron reaches its trigger point when?
Action potential is nerve impulse triggered when a neuron reaches its threshold, or trigger point for firing. Threshold trigger point for a neuron's firing about negative 50 millivolts.
A neuron fires only when its membrane reaches what?
When it reaches the nerve impulse threshold, the next neuron will fire..
What minimum level of a stimiulus required to activate a neuron?
threshold
When a neuron reaches its threshold?
When a neuron reaches its threshold, it initiates an action potential. This is a brief electrical impulse that allows for communication between neurons. The action potential travels down the axon of the neuron to transmit signals to other neurons or cells.
When a neuron is depolarized to threshold?
1. The neuron fires an action potential, sending the electrical signal down the axon.
What stimulus below this intensity will result in no response in a neuron?
Threshold stimulus
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 happens when a resting neuron's membrane depolarizes?
If it is sufficiently depolarized it will fire an action potential A depolarized neuron will successfully pass a message. If you have a polarized neuron will not be able to feel a burn, etc.
Neuron receives a series of stimuli whose effect is excitatory but subthreshold?
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.
What are the decision makers of the nervous system?
The neuron, by "deciding" wither or not to fire when a threshold of input stimuli come in to it.
What is a resting motor neuron expected to do?
exhibit a resting potential that is more negative than the "threshold" potential
