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Impulse

Impulse

1. The act of impelling, or driving onward with sudden force; impulsion; especially, force so communicated as to produced motion suddenly, or immediately. All spontaneous animal motion is performed by mechanical impulse. (s. Clarke)

2. The effect of an impelling force; motion produced by a sudden or momentary force.

3. (Science: mechanics) The action of a force during a very small interval of time; the effect of such action; as, the impulse of a sudden blow upon a hard elastic body.

4. A mental force which simply and directly urges to action; hasty inclination; sudden motive; momentary or transient influence of appetite or passion; propension; incitement; as, a man of good impulses; passion often gives a violent impulse to the will. These were my natural impulses for the undertaking. (Dryden)

Synonym: force, incentive, influence, motive, feeling, incitement, instigation.

Origin: L. Impulsus, fr. Impellere. See Impel. The electrical discharge that travels along a nerve fiber; they demonstrated the transmission of impulses from the cortex to the hypothalamus.


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Re: Is voluntary death from breath-holding possible?

No, they won't asphyxiate. They will only have a delayed impulse breath due to the reduced CO2 levels in their blood. The impulse breath is guided by the autonomic nervous system that is responding to mounting CO2 levels in the blood and falling O2 levels ...

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by daniel.kurz
Thu Oct 24, 2013 7:31 pm
 
Forum: Human Biology
Topic: Is voluntary death from breath-holding possible?
Replies: 1
Views: 951

Is voluntary death from breath-holding possible?

... Blackout , however taking place on land. The person hyperventilates , so as to reduce the CO2 level in the blood. This results in a delay of the impulse the breathe, and so a person may pass out from hypoxia before feeling an urge to gasp. Once unconscious, does the following muscular relaxation ...

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by Coelacanth
Tue Oct 15, 2013 8:25 am
 
Forum: Human Biology
Topic: Is voluntary death from breath-holding possible?
Replies: 1
Views: 951

Muscle Fiber Types are FICTIONAL, or is it not?

... more power to lift more weight - body has to grow muscle size, in order to do that it needs fast muscle contraction, which is achieved with bigger impulse coming from motor neurons. That's why it starts to add more motor neurons (hopefully it increases size as well). On the other side (for endurance ...

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by GPiklaov
Thu May 16, 2013 2:31 pm
 
Forum: Human Biology
Topic: Muscle Fiber Types are FICTIONAL, or is it not?
Replies: 0
Views: 2164

Do We Have The Freedom Of Choice?

... or a scientist's electrode or from the inside if the trigger is induced by its own genetic products. But in both cases, the reason for the neural impulse is purely electrochemical or physical. Now take a handful of neurons and you have a basic level nervous system - something similar that an earthworm ...

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by biohazard
Wed Apr 03, 2013 9:44 am
 
Forum: Cell Biology
Topic: Do We Have The Freedom Of Choice?
Replies: 27
Views: 27106

Why do neurones only have one axon?

... transmit signals very fast. I think what you actually want to know is would having multiple axons on a neurone speed up transmission of a nerve impulse and the answer to this i do not believe to be yes because neurones are insulated ( some are anyway) with a substance called myelin this enables ...

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by Drredfrizzle
Sun Nov 11, 2012 7:46 pm
 
Forum: Human Biology
Topic: Why do neurones only have one axon?
Replies: 1
Views: 2485
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