Question

how does a muscle cell move ?

Answer 1

The muscle cells move by contraction and relaxation by utilizing the energy in the form of ATP. During contraction, the muscles fibres shorten, the muscle pulls on the ligaments that connect the bones and the movable body parts. During relaxation the muscle fibres come to their original position.

Answer 2

Muscles move when the motor nerve attached to it get an impulse which makes the synapse (nerve ending on the muscle) to release a certain chemical on to the muscle cell - this (specific)chemical reacts with specific proteins in the muscle cell which would trigger a movement in the muscle by contracting or releasing the muscle (by fluid motion).

Hope it was helpful...