Dictionary » S » Switches



1. To strike with a switch or small flexible rod; to whip.

2. To swing or whisk; as, to switch a cane.

3. To trim, as, a hedge.

4. To turn from one railway track to another; to transfer by a switch; generally with off, from, etc.; as, to switch off a train; to switch a car from one track to another.

5. To shift to another circuit.

Origin: Switched; Switching.

1. A small, flexible twig or rod. Mauritania, on the fifth medal, leads a horse with something like a thread; in her other hand she holds a switch. (Addison)

2. A movable part of a rail; or of opposite rails, for transferring cars from one track to another.

3. A separate mass or trees of hair, or of some substance (at jute) made to resemble hair, worn on the head by women.

4. A mechanical device for shifting an electric current to another circuit. Safety switch, an arrangement of tracks whereby elevations otherwise insurmountable are passed. The track ascends by a series of zigzags, the engine running alternately forward and back, until the summit is reached.

(Science: physics) Switch board, a collection of switches in one piece of apparatus, so arranged that a number of circuits may be connected or combined in any desired manner. Switch grass.

(Science: botany) See grass.

Origin: Cf. OD. Swick a scourage, a whip. Cf. Swink, Swing.

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Re: Depolarization = ion channel opening?

I think you are correct (or more precisely when the Na+ channels open since the K+ open later). There is a threshold voltage that switches the state of what I found to be a flip-flop. The circuit is also called a "monostable multivibrator".

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by GaryGaulin
Thu Jan 08, 2015 6:01 am
Forum: Cell Biology
Topic: Depolarization = ion channel opening?
Replies: 1
Views: 665

Cost of Substitution (Re: Haldane's Dilemma)

In laymen terms, when evolution switches gears (major environmental change) large portion of population will die. Original argument was that calculated loss in population is such a case disproves evolution. However, a lot of assumptions were ...

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by Cat
Fri Oct 31, 2014 2:44 am
Forum: Evolution
Topic: Cost of Substitution (Re: Haldane's Dilemma)
Replies: 1
Views: 542

Re: some food for thoughts

... of a body involves all kinds of cascades of gene activations across many chromosomes; much of what happens with X and Y is simply genetic switches. There are genes on the Y chromosome (SRY in particular) which are not in the X chromosome; and this gene does act as a switch for many other ...

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by ChrisHoStuart
Mon Oct 14, 2013 1:07 am
Forum: Evolution
Topic: Gender divison in two opposites is greatest mistake of manki
Replies: 27
Views: 36195

Flaws of Life in a Tube

... and evidence of the theory of evolution. And as I said, I debated this to the end with JackBean, and at least in my mind proved him wrong, and he switches over to a religious cop out. But I appreciate the debate. Although, I will never be able to convince this man over the Internet. I have given ...

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by Tomn
Fri Nov 04, 2011 9:08 pm
Forum: Evolution
Topic: Flaws of Life in a Tube
Replies: 41
Views: 48170

Re: (Facilitated Diffusion), Carrier protein.

... significant force. If the energy barrier is low enough, a little thermal wiggle might be sufficient. You've encountered levers (perhaps electrical switches) that contain a spring so that the lever can be on one end-position or the other (say, left or right) but you must push against the spring ...

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by jonmoulton
Fri Jun 24, 2011 4:29 pm
Forum: Cell Biology
Topic: (Facilitated Diffusion), Carrier protein.
Replies: 3
Views: 10484
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