Purchase Solution

A description of sarcomeres and skeletal muscle contraction

Not what you're looking for?

Ask Custom Question

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?

Purchase this Solution

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.

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>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>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 ...

Purchase this Solution

Free BrainMass Quizzes
Identifying Variables in Science Experiments, Part 2

Using sample experiments, test yourself to see if you can identify independent, dependent, and controlled variables. Identifying variables is key in understanding and developing experiments. The questions are biology related, but this can be applied to any area of science.

Do You Know Your Macromolecules?

This quiz will assess your knowledge of the macromolecules that are important to living things.

Breastfeeding Basics

How much do you know about breastfeeding? Find out with this quiz!

How Well Do You Know Your Body?

This quiz will assess the different systems of the human body. It will examine everything from the organs to the cellular processes that occur.


Basics in biology