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Once the electrical, within-neuron signal starts, it will continue to the terminal end of the neuron in an all-or-none fashion, unless influenced by another neuron. For example, an inhibitory (e.g., GABA-ergic) neuron can stop or weaken the electrical signal in the first neuron (e.g., by increasing chloride influx). Once the neuron releases its transmitter, though, the transmitter has been released; however, that chemical signal can be modified either post- or pre-synaptically by action at the receptors.

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What is the path of a nerve impulse from your leg to your brain and back to your leg?

A nerve impulse travels from your leg to your brain through sensory neurons. Once in the brain, the impulse is processed, and a response is generated. The response travels back to your leg through motor neurons to initiate movement or action.


The message that travels through a neuron?

The message that travels through a neuron is an electrical impulse called an action potential. It is generated when the neuron is stimulated and travels along the neuron's axon, facilitated by the movement of charged ions. This ultimately allows the neuron to communicate with other neurons or target cells.


Why the transmission of nerve impulse is faster in medullated nerve fiber than in non-medullated nerve fiber?

generally the impulse is nothing but the stimulus carried to a part of body to carry out specific action in response to that stimulus.it is transmitted from one neuron to another or one neuron to another organ.this is carried all along the neuron and at the end that is at the synapse it gets diffused in neurotransmitter and again transmitted to another organ or neuron.this is carried very faster.this is started polarization of neuron and once polarized and being transmitted it cant be again polarizedthis occurs even more fastly in .mylenated neurons than in nonmylenated.bec in mylenated neurons the axon is partly covered by myleinshreath.this myleinshreath has a special property that it doesn't allow ions to pass through it.since polarization is occurred due to movement of ions in and out of axons,and the mylein shreath doesn't allow this the leaping of ions occurs.and as a result impulse been transmitted as a loop of current by taking leap at mylein shreath.while in nonmylenated ones no such leaping occurs and it is transmitted slowly all along the length of axon.so impulse transmission occurs very fast in mylenated ones.


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.


What are neuronal endings?

Neuronal endings, also known as axonal terminals, are the tips of axons that make connections with other neurons, muscles, or glands. These structures play a critical role in transmitting information between neurons by releasing neurotransmitters across the synapse. Neurotransmitters allow for communication and signal transmission within the nervous system.

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