When dealing with stress, having to expend too much mental or physical energy over too long a period of time is known as: high demand high effort low control low reward?

High demand high effort. depends on the person really.

Mitochondria is the cell organelle that produced the energy that is needed in the body system in form of atp, that is why it is called the power house of the cell. energy is needed by the living organisms to carry out the activities which sustain life.  if the mitochondria is destroyed atp will not be produced. if the mitochondria is destroyed, energy production will stop and the affected living organism will not have the energy to carry out the necessary life processes; this will lead to the death of the organism.

Icant be totally sure but i would say with confidence that it is example #1 about cells.