The sarcomere is a small functional unit within the muscle: Lined up one behind the other, they form the filament-like myofibrils that are grouped together to form muscle fibers. Electrical stimulation by nerve cells causes the filaments within a sarcomere to push into each other, causing the muscle to contract. What is the sarcomere? There … Sarcomere: Structure, Function & Diseases
Definition of striated musculature Transverse striated muscle is the name given to a certain type of muscle tissue because under polarizing light (for example, a simple light microscope) it looks as if the individual muscle fiber cells have regular transverse striation. Normally, the term is used synonymously for skeletal musculature, since this type of tissue … Striated Musculature
Excitation of the striated musculature An important feature of the striated muscles, precisely to distinguish them from the smooth muscles and the heart muscles, is that they are subject to our arbitrary control. ́Quergestreifte Muscles can be consciously tensed or relaxed by us. They are reached by motor nerve fibers, at the end of which … Excitation of the striated musculature | Striated Musculature
Definition A muscle fiber (also: muscle fiber cell, myocyte) is the smallest unit of a skeletal muscle; the muscle cells of the smooth muscle and the heart muscle show certain similarities to the muscle fibers, but are not called so. Structure of a muscle fiber A muscle fiber is a so-called syncytium. This means that … Muscle Fiber
Composition In total, a muscle fiber consists of about three-quarters water, 20% protein (half of which is provided by the contractile proteins actin and myosin) and 5% ions, fats, glycogen (an energy store) and nitrogenous substances. Types of muscle fibers Two different types of muscle fibers are distinguished by their function. On the one hand … Composition | Muscle Fiber
