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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 does all or non response mean to human anatomy?
All-or-none response means that things have to reach a certain threshold, a certain level before they happen. If it reaches that threshold, it becomes a cascading response that increases in size. If it fails to reach the threshold, well, nothing happens.
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 the response if you increase the stimulus intensity past the threshold level for a neuron?
Try increases dramatically......
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..
When the ions are moving across the membrane during the depolarization and repolarization phases of an action potential they are moving by?
Depends on what stage you are talking about. Stimulus of sodium ions from dendrites of other neurons must reach a threshold. Once that threshold is reached, sodium ions quickly diffuse into the neuron via facilitative diffusion, depolarizing the neuron. Upon this occurring, sodium channels close and potassium ions are pumped out of the neuron via active transport, leading to repolarization of the neuron.
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.
