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 ...

Jan 8, 2026 · In this lesson, we will explore how muscle contraction and relaxation takes place, address the role & importance of calcium in this process, and...

Learn how muscle contraction works in our detailed video lesson. Explore the process, types, and proteins involved, then test your knowledge with a short quiz.

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.

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.

This lesson will explain the role of hydrolysis of ATP in heat production and muscle contraction and explore how skeletal muscle contraction generates heat in support of temperature homeostasis.

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.

Cardiac muscle has to contract to pump blood throughout the vascular system. This lesson covers the dynamics and physiological processes regulating cardiomyocyte contraction and the ion channels ...