Dictionary » K » Kick

Kick

Kick

a brisk mechanical stimulus.

atrial kick, the priming force contributed by atrial contraction immediately before ventricular systole to increase the efficiency of ventricular ejection due to increased preload.

idioventricular kick, the increased contractility of the initially contracting ventricular fibres which, by stretching the later contracting fibres, increases their force of contraction.


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Re: The Colin Leslie Dean species paradox

... be able to mate with other betaBirds (parent population) but the new genes would be spread over subsequent generations and natural selection would kick in. Let me address "species" for a moment. Species, to me, are essentially ecologically stable gene cohorts. They exist as a "species" ...

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by AstusAleator
Sat Jul 18, 2009 12:46 am
 
Forum: Evolution
Topic: The Colin Leslie Dean species paradox
Replies: 120
Views: 2190

Re: A question from Cloning

... the basic cloning process. I can imagine that when two nuclei merge as in standard fertilization, some energy may be released, which could kick start the process of embryo development. But when you replace the egg nucleus with a nucleus from another cell, where does the trigger for embryo ...

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by koyal
Wed Jul 15, 2009 6:07 pm
 
Forum: Cell Biology
Topic: A question from Cloning
Replies: 16
Views: 504

The Immune System - Recognition in innate immunity. How?

... time; unless there is immunological memory (i.e. a re-infection or after vaccination), it takes several days from the adaptive immune response to kick in, whereas the innate one works immediately. If the infection persists, the adaptive response typically takes the main role in eradicating the ...

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by biohazard
Tue May 12, 2009 7:43 am
 
Forum: Cell Biology
Topic: The Immune System - Recognition in innate immunity. How?
Replies: 1
Views: 1283

Natural selection is proven wrong

... in the past, because people simply died before it had time to have an effect, and because it requires many genetic and environmental factors to kick in, so on a large scale as far as human populations are concerned, it's a mere nuisance. Breast cancer (and cancers in general) have a marked impact ...

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by biohazard
Wed Apr 22, 2009 1:43 pm
 
Forum: Evolution
Topic: Natural selection is proven wrong
Replies: 177
Views: 16621

Re: can anyone help me answer these biology questions?

... that is the problem with today’s youth (not to imply all youth's); many have been coddled far too long and expect the easy fix. Maybe a swift kick in the behind is better medicine and what they need. Grumble, grumble...

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by MichaelXY
Fri Feb 06, 2009 9:07 am
 
Forum: General Discussion
Topic: can anyone help me answer these biology questions?
Replies: 2
Views: 758
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