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Pump

pump

An hydraulic machine, variously constructed, for raising or transferring fluids, consisting essentially of a moving piece or piston working in a hollow cylinder or other cavity, with valves properly placed for admitting or retaining the fluid as it is drawn or driven through them by the action of the piston.

For various kinds of pumps, see air pump, chain pump, and force pump; also, under lifting, Plunger, Rotary, etc. Circulating pump See well.

Origin: Akin to D. Pomp, G. Pumpe, F. Pompe; of unknown origin. The hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions pump blood through the body; he stood still, his heart thumping wildly.


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Does other animals have faster nerve speeds?

... that need to be very fast. For example the giant squid has an axon up to 1mm thick and is responsible for the essential system that allows it to pump water and move around. For escaping from trouble this quick response therefore merits a very, very quick response. The actual massive size is probably ...

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by Babybel56
Fri Feb 28, 2014 8:55 am
 
Forum: General Discussion
Topic: Does other animals have faster nerve speeds?
Replies: 1
Views: 1362

Re: staphylococcus aureus and biofilm formation

... usually a protein (but not always) therefore making the antibiotic less effective. Other resistance factors include efflux systems that can pump the antibiotic back out of the cell, alternative metabolic pathways etc

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by stopherlogic
Wed Aug 21, 2013 3:00 pm
 
Forum: Microbiology
Topic: staphylococcus aureus and biofilm formation
Replies: 3
Views: 2989

FADH2 in the Electron Transport Chain?

... is oxidised, losing its electrons to the reduction of O to H20. In doing so, it changes to a lower energy state and the excess energy is used to pump protons from the matrix of the mitochondria to the outer membrane of the mitochondria. What I don't understand is what happens to FADH2. Is it ...

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by natasha88
Tue May 07, 2013 4:59 am
 
Forum: Human Biology
Topic: FADH2 in the Electron Transport Chain?
Replies: 1
Views: 2981

ETC - purpose of having different dehydrogenases?

... dehydrogenase complexes (more specifically, NDH-1 and NDH-2). One major difference between the two is the fact that NDH-1 is a coupling site (so pumps out protons while transferring electrons) while NDH-2 is not; will not pump out any protons. As a result of this, the NET ATP produced will be ...

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by keetner
Sat Dec 15, 2012 2:28 am
 
Forum: Molecular Biology
Topic: ETC - purpose of having different dehydrogenases?
Replies: 1
Views: 2318

Re: Questions on the Sodium Potassium Pump and Enzymes

Thanks. :D Any chance of clearing up the other stuff I'm stuck on?

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by JoWillyTso
Tue Nov 06, 2012 2:50 pm
 
Forum: Cell Biology
Topic: Questions on the Sodium Potassium Pump and Enzymes
Replies: 3
Views: 3674
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