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2011-09-09 13:29:04

The heartbeat is the result of rhythmic contractions of the heart muscle, which are in turn regulated by electrical signals called action potentials.

2011-08-02 14:11:11

An international team of molecular scientists have discovered that star ascidians, also known as sea squirts, have pacemaker cells similar to that of the human heart.

2010-08-17 17:05:33

New research in the Journal of General Physiology helps explain how the body's "flight-or-fight" response is mediated.

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2009-04-09 13:29:39

Artificial heart pacemakers have saved and extended the lives of thousands of people, but they have their shortcomings – such as a fixed pulse rate and a limited life. Could a permanent biological solution be possible?


Word of the Day
ecotone
  • A transitional zone between two communities containing the characteristic species of each.
The word 'ecotone' comes 'eco-' plus a Greek root meaning 'tension'.