Explore BrainMass
Share

Explore BrainMass

    A description of sarcomeres and skeletal muscle contraction

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    What is a sarcomere?

    What are some functional differences between skeletal and cardiac muscles?

    What happens within the muscle fibers to cause a muscle to contract?

    © BrainMass Inc. brainmass.com October 9, 2019, 3:21 pm ad1c9bdddf
    https://brainmass.com/biology/human-anatomy-and-physiology/a-description-of-sarcomeres-and-skeletal-muscle-contraction-2269

    Solution Preview

    A sarcomere is the functional unit of a muscle cell; it is the smallest part of a muscle cell with the ability to contract.
    <br>
    <br>It is made up of two halves of an I-band, an A-band and has z-disks on either end. If you're not familiar with the terminology, let me explain more clearly:
    <br>
    <br>A muscle is powered by myosin, a motor molecule. It uses energy from ATP to move along a structural protein called actin. The A-band is composed of myosin fibres, with the direction of pull towards the centre. The I band consists of actin filaments, which is what the myosin pulls against. The actin filaments are anchored in the z-disks, so that when ...

    Solution Summary

    A description of sarcomers and the function of muscle fibers to cause contraction. Includes a figure from Lodish et al, Molecular Cell Biology 3e, 1996. Also includes a brief description of the differences between skeletal and cardiac muscle.

    $2.19