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A nerve impulse is an electrical signal that travels along an axon. There is an electrical difference between the inside of the axon and its surroundings, like a tiny battery. When the nerve is activated, there is a sudden change in the voltage across the wall of the axon, caused by the movement of ions in and out of the neuron.
This triggers a wave of electrical activity that passes from the cell body along the length of the axon to the synapse.
The speed of nerve impulses varies enormously in different types of neuron. The fastest travel at about 250 mph, faster than a Formula 1 racing car. For the impulse to travel quickly, the axon needs to be thick and well insulated.
This uses a lot of space and energy, however, and is found only in neurons that need to transfer information urgently.
For example, if you burn your fingers it is important that your brain gets the message to withdraw your hand very quickly.
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∙ 7y ago
Wiki User
∙ 11y agoA nerve impulse is a pulse of electricity, an action potential, that passes along the nerve. The speed at which it travels is called its conduction velocity and in human nerve fibres, this velocity ranges between 1 and 3 metres per second in unmyelinated fibres and between 3 and 120 metres per second in myelinated fibres.
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∙ 7y agonerve impulses
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What is the job of neuron?
The function of a neuron is to transmit a signal at a very fast rate. The function of the entire nervous system is to provide a system that allows for signals to be transmitted quickly from one specific location to another locations.
How does a nerve impulse begin?
In order a nerve impulse to be generated there needs to be a stimulus. A stimulus would be you burning your finger or bumping your arm. Once the nerve impulse has been generated it sends off to the neurons in your brain so that your brain can tell you to move your hand.
How fast can nerve signals travel?
Nerve signals travel at a speed of 0.5-150 m/s. The speed varies greatly depending on how much myelin there is around the nerve thread, more myelin means higher speeds.
How fast does electrical signals travel through the human body?
350 ft/s
Are dendrites and axons both armlike processes that extend from cell bodies?
Yes, it is true. Dendrites: Arm-like processes that extend from the cell body of all neurons which receive signals. They are short, tapering, and have branching extensions and are usually found close to the cell body. Dendrites are unmyelinated (slow conductors). Axons: Are single arm-like process that extends from the cell body of all neurons which generate and transmit nerve impulses. They can be long (up to ~ 1 meter) or short with diffuse branching at the end. Axons are myelinated (fast conductors).
How does your brain send orders so fast?
This is due to electronic signals are transmitted between brain and other parts of the body; the ever fastest communication.
What is the job of neuron?
The function of a neuron is to transmit a signal at a very fast rate. The function of the entire nervous system is to provide a system that allows for signals to be transmitted quickly from one specific location to another locations.
What Is A Unit Used To measure The Speed Of How fast Signals Are Transmitted?
Fast transmission: bits/kilobits/megabits/gigabits per second,or bandwidth of analog baseband information in Hz.Fast delivery: miles per second
How are nerv impulses transmitted?
Nerve impulses are transmitted between neurons, into neurons, and along neurons. They are transmitted between neurons at a synapse, into neurons at a dendrite, and along neurons at the axon.Transmission at the synapse is via neurotransmitters released from the end of one neuron into the synapse, where they diffuse quickly over to the next neuron, usually to a dendrite or dendritic spine.Transmission into the next neuron is by the neurotransmitters causing pores to open in the next neuron which allow Sodium ions to enter, which begin to propagate a electrochemical impulse by electrotonic conduction along a dendrite and across the soma. Electrotonic conduction is a process in which ions "bump" one another, causing them to somewhat "pile up" eventually at the axon hillock at the beginning of the axon. It's a very fast process, but it looses strength along the way, so in order for the axon to fire, there needs to be either many dendrites contributing, or one or more dendrites being stimulated quickly and often, so as to allow a summation of the voltages resulting from the "pile up" of the ions at the axon hillock.Transmission along the axon of the neuron is by the action potential, which involves a successive exchange of Sodium and Potassium ions, each exchange causing the next.for more about the action potential, see:How_does_a_nerve_impulse_get_transmitted_along_an_axonoriginal answer:Nerve Impulses are transmitted electrochemically via an action potential.Information (either a sensation such as being touched, or a desire for action such as moving your hand and picking up a pen) is passed from the nerves dendrites to its axon which stimulates the action potential.The action potential is a whole subject in itself.
How does a nerve impulse begin?
In order a nerve impulse to be generated there needs to be a stimulus. A stimulus would be you burning your finger or bumping your arm. Once the nerve impulse has been generated it sends off to the neurons in your brain so that your brain can tell you to move your hand.
Do Signals travel along nerves in the form of rapidly diffusing neurotransmitters?
yes bcoz of myelin sheaths on the neurons .. they help the signal to move by jumping ... so that it moves faster with the help of neurotransmitters like acetyl choline .which helps in fast coduction of nerve impulse ..they r found generally at nerve endings to transfer the signal from 1 neuron to other.
What is the difference between slow and fast FHSS?
The difference between slow and fast FHSS is the speed of the transmitting radio signals. Both have signals that are difficult to intercept.
Does electricity react faster than the human mind?
In fact the brain uses electrical signals to communicate between the brain cells (neurons), so I guess the answer is they're just as fast? But it's a really unclear question, I mean react to what, and which kind of reaction?
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 do photographers with wire agencies transfer images of an event for downloads so fast?
Via the internet, often with a wireless link from a laptop. Sometimes over a satellite link along with video signals.
What are part icles called that move really fast?
Certainly not the neurons in your brain...learn English.
What is the pathway called that signals travel along during a reflex?
Sensory neurons which trigger reflexes are called nociceptive neurons. After entering the dorsal root of the spinal cord, the nociceptive neuron branches into two terminals: one terminal synapses with an interneuron - a localised neuron which is located entirely within the grey matter of the spinal cord, and this in turn synapses with a motor neuron which then triggers the fast reflex action. The reflex is initiated solely within the spinal cord & doesn't involve the brain at all, but at the same time, the second branch of the nociceptive neuron synapses with a sensory neuron which goes to the brain; the brain then registers the sensation of pain, and can also initiate further motor action if necessary.
