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Refractory

refractory

Not readily yielding to treatment.

Origin: L. Refractorius


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nerve impulses?!

The frequency of nerve impulses along a certain neuron is controlled by A. length of the refractory period B. level of the threshold potential C. polarity of the resting membrane D. intensity of the stimulus received Okay so I want to double chek I belive the answer ...

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by frogsrcool
Tue Feb 27, 2007 11:07 pm
 
Forum: Cell Biology
Topic: nerve impulses?!
Replies: 5
Views: 645

BIOLOGICAL PACEMAKER-SA NODE

... because it generates impulses slightly faster than the other areas with pacemaker potential. Because cardiac myocytes, like all muscle cells, have refractory periods following contraction during which additional contractions cannot be triggered, their pacemaker potential is overridden by the sinoatrial ...

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by dipjyoti
Tue Sep 26, 2006 11:20 am
 
Forum: Human Biology
Topic: BIOLOGICAL PACEMAKER-SA NODE
Replies: 10
Views: 979

The Fiber Disease

The Ozone . . that sounds totally logical. given that the efforts to manipulate refractory rates especially just at dusk and lensing for a global combined depletion of Ozone (often pierced in super cells to steer common thunder storms and massive depletion in Tornadogenesis ...

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by Nadas Moksha
Sun Aug 13, 2006 9:53 pm
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 748693

The Fiber Disease

... believe. Dear Ms. Yaskal, I am one of the transplant coordinators at Northwestern. We do indeed treat specific autoimmune diseases that have been refractory to conventional therapy and pose threat to organ function. I am attaching generic information on stem cell here at Northwestern. We would ...

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by RANDY
Thu Jun 29, 2006 12:52 am
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 748693

How does the heart work?

... reached, resulting in contraction cycles. Ok. So at the time of action potential, the Ca(2+) channels are letting calcium flow into the cell. The refractory period is relatively long. Why is it so long? the pacemaker actionpotential is way shorter than the cardiac actionpotential (plateauphase ...

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by sdekivit
Mon Jan 23, 2006 1:22 pm
 
Forum: Human Biology
Topic: How does the heart work?
Replies: 11
Views: 1526
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