<prompt> True about Bowditchs effect of heaIncreased in HR decrease relaxationIncreased in HR increase relaxationIncreased in HR decrease contractionIncreased in HR increases contraction  <response>: Bowditchs effect: - Bowditch was a German physiologist. He put foh the term Treppe, which mean staircase. If you increase the frequency of a stimulus to a muscle, each succeeding contraction would be stronger than a preceding one. This effect has been ca The staircase effect or Bowditchs effect. Increase frequency of stimulation results in increasing strength of contraction. Physiological basis for this effect is increased sarcoplasmic calcium. Strength of contraction of muscle ? amount of sarcoplasmic calcium. 