• Choose the missing prepositions from the drop-down menus below.
  • Click the button at the bottom to check your answers.
  • Press the "refresh" button on your browser to play again.

   around      at      by      down      down      for      for      from      in      in      in      of      of      of      of      on      over  
Scientists Israel say they have conducted tests to successfully stop and reverse the biological ageing process. The tests were part a joint project Tel Aviv University and the Shamir Medical Center. The researchers said the science behind their experiments was very simple - they used only oxygen to slow and turn around what happens to cells as they age. They used high-pressure oxygen cells that were a pressure chamber. The scientists said two processes related to ageing and illnesses slowed . The scientists did tests on 35 adults the age of 64 for 90 minutes a day, five times a week three months. Their study was published the magazine "Ageing" on November the 18th.

A lead scientist explained how important his team's research was. Professor Shai Efrati says the study shows that the ageing process can be reversed the cellular level. He says we may be able to stop telomeres shortening. Telomeres are inside cells. The shorter they become, the more we age. If we can stop them getting shorter, cells will not age. Professor Efrati said: "Today telomere shortening is considered the 'Holy Grail' the biology ageing. Researchers the world are trying to develop [drugs] that enable telomere lengthening." He added: "The study gives hope, and opens the door a lot young scientists to target ageing as a reversible disease."

Back to the ageing lesson.

Share this lesson

More Free Sites by Sean Banville

Online Activities