What happens when a muscle contracts? Learn about the muscle contraction process and the role of the proteins actin and myosin in muscle contraction, as well as the types of muscle contraction and ...

Dec 4, 2025 · In this lesson, we will explore how muscle contraction and relaxation takes place, address the role & importance of calcium in this process, and...

The cross-bridge muscle contraction cycle is recognized in all types of muscles, such as cardiac, smooth, and skeletal muscles. This means that all muscle types contract by cross-bridge cycling.

Learn about the importance of ATP, the roles of creatine phosphate and creatine phosphokinase in muscle metabolism, and the function of glycolysis.

Learn what excitation-contraction coupling is. Discover key actors in muscle contraction and identify the steps of the muscle contraction and relaxation process.

Myosin molecules interact with actin filaments, a component of the cytoskeleton. When bound to actin, myosin uses energy from ATP to pull on actin and cause a muscle contraction.

A sarcomere is a basic unit of function within muscle tissue. The contract with the use of thick and thin filaments in order to allow muscle to shorten or contract. What does myofibril mean?

Learn about the length-tension and force-length relationship and why they are important to skeletal muscle. Discover examples of the length-tension curve.

Discover the primary function of a wave summation. Learn about muscle twitches, examine the varying stages, and understand how a twitch contraction...

What is the cremaster muscle? Learn the cremaster muscle function and its location. Learn how the contraction of the cremaster muscle plays a vital role in testicular health.