10 MAR 2019 by ideonexus

 The Chess Stress Response

Another aspect of chess as a sport is the intense psychological and physiological exertion involved in a competitive chess game, and the crisis after the game. What sports science calls the "stress response process" is at least as powerful in chess as it is in more physical sports. When I say exertion, I am not referring only to the mental gymnastics of moving the pieces in our minds, but also the huge nervous tension that fills you before and during the game, tension that rises and falls wit...
Folksonomies: physiology stress gaming
Folksonomies: physiology stress gaming
  1  notes
 
21 MAY 2013 by ideonexus

 Different Cells are Replaced at Different Rates

Different types of cells have different lifespans, e.g.:  we shed our skin cells about every 35 days red blood cells live about 120 days, platelets 6 days and white cells less than a day most of the adult skeleton is replaced about every 10 years the average age of a fat cell seems to be about 10 years a 25-year-old heart replaces about 1% of all its cardiomyocytes (heart muscle cells ) over the course of a year, while a 75-year-old heart replaces about half a percent ...
Folksonomies: biology physiology
Folksonomies: biology physiology
 1   notes

Neural cells are not replaced at all.

12 JUN 2012 by ideonexus

 Candles and Animals Both Need Oxygen

If a small animal and a lighted candle be placed in a closed flask, so that no air can enter, in a short time the candle will go out, nor will the animal long survive. ... The animal is not suffocated by the smoke of the candle. ... The reason why the animal can live some time after the candle has gone out seems to be that the flame needs a continuous rapid and full supply of nitro-aereal particles. ... For animals, a less aereal spirit is sufficient. ... The movements of the lungs help not a...
Folksonomies: physiology respiration
Folksonomies: physiology respiration
  1  notes

Quoting John Mayow.

06 JUN 2012 by ideonexus

 The Immune System

An immune system of enormous complexity is present in all vertebrate animals. When we place a population of lymphocytes from such an animal in appropriate tissue culture fluid, and when we add an antigen, the lymphocytes will produce specific antibody molecules, in the absense of any nerve cells. I find it astonishing that the immune system embodies a degree of complexity which suggests some more or less superficial though striking analogies with human language, and that this cognitive system...
Folksonomies: immune system physiology
Folksonomies: immune system physiology
  1  notes

Enormously complex and acts independently of the brain.

05 JUN 2012 by ideonexus

 Nature contains no one constant form.

With respect to those who may ask why Nature does not produce new beings? We may enquire of them in turn, upon what foundation they suppose this fact? What it is that authorizes them to believe this sterility in Nature? Know they if, in the various combinations which she is every instant forming, Nature be not occupied in producing new beings, without the cognizance of these observers? Who has informed them that this Nature is not actually assembling, in her immense elaboratory, the elements ...
Folksonomies: nature physiology form
Folksonomies: nature physiology form
  1  notes

It has the propensity to produce new forms, not just what we see today.