• Question: how does are heart pump (motavaite) and how does the brain....like turn on if no much is powering it ??????????

    Asked by kyky127 to Hitesh, Hywel, Mae, Nik, Tiffany on 15 Jun 2012.
    • Photo: Mae Woods

      Mae Woods answered on 15 Jun 2012:

      The heart pumps because of a pacemaker rhythm. This is a beating that is controlled by cells that can produce electrical signals (yes that is right electrical signals in the body!). The signal is generated by interacting proteins that live inside cells and change something called a potential. The potential rises and falls like a wave in the sea.

      The electrical signals cause the cells to contract so that the blood gets pushed through the heart valves like a pump.

      To answer your second question, brain cells do have a power. This power is called metabolism where the cell breaks down things that we get from eating and uses them to make a small molecule called ATP that is used to fuel the cell

    • Photo: Hitesh Dave

      Hitesh Dave answered on 20 Jun 2012:

      Brain has lots of neurons which are mainly uses energy called ATP from the breakdown of the cells (Cell Metabolism),,,,and brain controls most of all tissues in the body…

      Heart wall is basically good involuntary muscle which works by electric signals…and when the signal goes up and down heart’s valves push the impure blood to other chamber of the heart and gets the pure blood..this will go on and on…

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