Filament Essays

The sliding filaments theory of muscle contraction was discovered in 1954 proposed that muscle contraction is an onset cyclic process which involves the sliding of filaments and the shortening of sarcomere. Striated muscles such as skeletal muscles contain a highly organised internal structure which allows these muscle to contract following the mechanism of sliding filament theory. Skeletal muscle contraction requires an action potential which is an electric signal sent though motor neurones towards

sliding filament theory: Before this unit I knew nothing about the sliding filament theory. After learning about the sliding filament theory, I discovered that, it is the contraction of a muscle. It slides the thin actin filament over the thick myosin filaments causing the muscle to shorten and create movement. When I researched more about the sliding filament theory I learned that each muscle fibre is made up by myofibrils, that consist of smaller structures called actin and myosin filaments. These

Thomas Alva Edison created the first incandescent light bulb. The way it would work is that their would be some bamboo filament in the bulb under the part where the light would start. This filament would run about 1200 hours. The filament would mostly run the whole bulb. Edison would manufacture and sell his product that would impact people's lives. Edison has tried so many filaments that would not burn out in thirty seconds and he found some bamboo. Edison would manufacture the bamboo that would

myosin, troponin and tropomyosin. Also known as the thin and thick filaments respectively, actin and myosin interact to enable the shortening and lengthening of the sarcomere. Troponin and tropomyosin are regulator proteins that allow the sarcomere to shorten in the presence of calcium ions (Ca2+) and lengthen in the absence of calcium ions . The interaction of the thin and thick filaments can occur through the sliding filament theory or the cross bridge theory. The contraction and relaxation of

Almost half of a human 's body weight is composed of muscle. There are three distinct types of muscle tissue: cardiac muscle, skeletal muscle, and smooth muscle. Each of the muscle tissues have different structures, properties, characteristics, and roles in our body. Properties of muscle tissues include excitability, contractility, extensibility, and elasticity. Contractility is the ability to shorten, which causes movement of the structures to which the muscles are attached. Excitability is the

Cytoskeletons are common for every living organisms present, be it bacteria, archaea, eukaryotes or prokaryotes. It is present in the cytoplasm of a cell and has a very complex network that consists of tubules and filaments that interlink each other1. Cytoskeletons are comprised of three main proteins in eukaryotes and they are usually able to multiply very fast or even disassemble depending on what the cell needs at any given moment.2 The structures of cytoskeletons can differ from one another and

Myofibrils contain two types of overlapping protein called filament (actin and myosin), which lie side by side. Myosin is the thick filament which is shape like a golf clubs and the actin is the main filament of the thin filament. To give you a rear viewed on these filaments, a single muscle fibre may contain an estimated 16 billion thick and 32 billion thin filaments, all arranged in this precise pattern within the myofibrils. Myofibrils take up 80% of volume within

Most of the human body is made of bones and muscles. According to (Muscolino, 2011) the skeletal system consists of bones and provides a strong framework for the body. The muscle system is made of a group of skeletal muscle tissue that are attached to bone. This essay will discuss how the muscle and skeletal system work together. The aspects that will be explained are movement, protection and the differences. The muscle and skeletal system work together to produce movement. An example of movement

usually attached to bone, and is connected by collagen fibers. These fibers are known as tendons. Skeletal muscle is refers to many bundles of cells known as muscle fibers(fascicles). This type of muscle is highly composed of actin and myosin filaments. These filaments are repeated, forming sarcomeres. The sarcomeres are important to the skeletal muscle because they are responsible for the striations that appear on the skeletal muscle. It also forms the necessary parts required for muscle contractions

the sliding filament theory, giving a step by step process.

1.1 The Cytoskeleton The concept and the term ‘cytosquelette’, (in French) were first introduced by a French embryologist Paul Wintrebert in 1931 (Frixione 2000). Cytoskeleton is a complex network array of cytoplasmic fibers that determine and control visco-elastic properties and mechanical strength of cells. It also organizes and gives structure to the cell interior, controls many dynamic processes, such as intracellular trafficking, cell division, adhesion, and locomotion. It is ubiquitously present

The filament of the cathode is heated with the help of an electrial circuit. This is similar to how the filament of a light bulb is heated when current passes through it. "The filament is heated with the electric current passing through it, to the glowing temperature and the electrons are then expelled from the cathode".The process is known as

sliding filament model of contraction states that during contraction the thin filaments slide past the “thick ones so that the actin and myosin filaments overlap to a greater degree” (Marieb & Hoehn). When the nervous system stimulates muscle fibers, the myosin heads on the thick filaments latch onto myosin-binding sites on actin in the thin filaments, and the sliding begins. These cross bridge attachments form and break several times during a contraction, tension and propel the thin filaments toward

It consists of 3 types of fibres; microtubules, intermediate filaments and micro filaments. It is a sturdy, dynamic 3D structure that fills the cytoplasm. The cytoskeleton has many functions including to provide structure to the cell and to allow the cell to change shape along with the intercellular movement of molecules. As

Thomas Alva Edison was born in Milan, Ohio, on February 11, 1847, the seventh and youngest child of Samuel and Nancy Edison. The family moved to Port Huron, Michigan, when he was seven years old. Edison began working on electric lighting in September 1878, and On January 27, 1880, Thomas Edison received U.S. Patent No. 223,898, which was “Electric Lamp.” Historians agree that Thomas Edison was not the inventor of the electric light bulb, but he did produce the first commercially viable one. Earlier

invention by patenting the use of a carbon filament which made possible the widespread use of electric light in public and at home. Like Thomas Edison, Lewis Latimer had little formal childhood schooling. His inventions included an evaporative air conditioner, an improved process for manufacturing carbon filaments for light bulbs, and an improved toilet system for railroad cars.Lewis Latimer invented a method for producing a more durable carbon filament, making incandescent lighting practical and

son of George and Rebecca Latimer, who were both escaped slaves. Latimer's most significant contribution was his work on the development of the carbon filament for the incandescent light bulb. In 1881, he was hired by Hiram Maxim, who was working on improving Thomas Edison's original design. Latimer was able to create a more durable carbon filament that made the bulbs last longer and burn brighter. His improvements were critical to the widespread adoption of electric lighting, which revolutionized

would change forever. And the would throw the world's technology and history for so big of a loop that it would revolutionize the world and it was the light bulb. Edison placed filament inside a glass bulb and spent months searching for an affordable filament that produces the most light. In 1880 they used the bamboo filament. And it seems it worked. Thomas Edison found his support for this project from J.P. Morgan and Edison told him it would be way safer than gas and also way

“Noiseless” means silent. Noiseless also allows us to know that whoever or whatever is observing the spider is bigger than the spider. The spider was also “patient” which also means that he is accepting to delays and problems without becoming annoyed. This helps the reader begin to look at the spider in a different way instead of as a plain spider. Whitman uses “I mark’d” which means he was the one to notice where the spider was at. The spider was on a “promontory” or a high point on land. The spider

lasted 2 days and 40 hours and this was just the start. (Encyclopedia)Now most light bulbs can last years and it 's quite impressive from going only 2 days to years. With Edison 's experiment with the light bulb he had used a carbonized cotton for his filament. Throughout the timeline of