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Keshu

Public·30 members

Contracting and Relaxing

What is muscle contraction

A muscle contraction happens when muscle fibers become shorter and generate force.


  • During contraction: Muscle fiber pulls together.


  • The muscle becomes shorter or develops tension.


  • Mucles move when Bones pull on them through tendons.


  • Energy is used.


Examples:


  • Bending our elbow.


  • Clenching our fist.


  • Jumping.


  • Chewing food.


What is Muscle Relaxation

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