Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions


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...
0 0 0
The muscle cells move by contraction and relaxation by utilizing the energy in the form of ATP. Muscle contraction is initiated bythe signal sent by the CNS to the muscle fibres. During contraction, the muscles fibres shorten, the muscle pulls on the ligamentsthat connect the bones and the movable body parts. During relaxation the muscle fibres come to their original position. Thismovement of muscles cells or the muscle fibres results in the movement of the body parts.
0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts