<prompt> Enzyme level in tissue injury is due to-Lysis of cellsEnzyme secretionNo inhibitor in serumAll of the above  <response>: Ans. is a i.e., Lysis of cells o Leakage of intracellular proteins enzyme across the degraded cell membrane into the peripheral circulation provides a means of detecting tissue specific cellular injury and death. o For example, creatinine phosphokinase for cardiac muscle injury and alkaline phosphatase for liver injury. 