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An action potential needs to occur to trigger the neurons but the action potential depends on whether a stimulus is able to bring the membrane potential to a certain level termed the THRESHOLD. This threshold is about -55 mV for most neurons, but the stimulus needs to bring the membrane potential to this certain level or it will not be triggered. Relating to the ALL-OR-NONE PRINCIPLE, which if the threshold is not acquired then an action potential will not occur but once a stimulus is strong enough to depolarize (making the inside of the cell less negative going from -70 mV to -55 mV) it will trigger. The resting potential is -70 mV which the stimulus needs to bring it up to -55mV.

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13y ago
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14y ago

The minimum level of stimulation required to trigger a neural impulse is called the Threshold.

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9y ago

The minimum level of stimulus that is required to active a neuron is called the neuron's threshold. The neuron's reflex is its response to stimulus.

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11y ago

threshold stimulus

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threshold

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1 second

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Threshold

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Threshold.

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Q: Minimum level of stimulation required to trigger a neural impulse?
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How does the all or none principle relate to the transmission of a nerve impulse?

The nerve impulse (action potential) either occurs, or it doesn't, depending on whether or not a sufficient summation of inputs from dendrites at the axon hillock (the trigger point) has occurred, either temporally or spatially.That is, if a large enough number of dendrites have received inputs from other neurons such that their total contribution of electrotonic impulses to the axon hillock results in enough Na ions there to trigger the action potential, or, if one or more dendrites is/are stimulated so often or quickly that, again, there are enough Na ions pushed to the axon hillock to trigger the action potential, then the nerve will "fire". If not enough Na ions are caused to congregate at the axon hillock by either means, then the action potential will not occur, and there will be no transmission of a nerve impulse.


How does a message jump across the synaptic gap and passes to the next neuron?

Nerve impulses, which are electrical, do not jump across the synaptic gap at synapses. Instead, the arrival of a nerve impulse at the axon terminal triggers the release of chemicals called neurotransmitters from the axon terminal into the synaptic gap, the nerve impulses then travel across the chemicals to the place where it needs to go to


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It can trigger a tsunami.


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Yes the tsunami did trigger the nuclear blast because the water got into the nuclear reactor and buggered it up

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