Myosin

Muscles work in pairs. one muscle contracts and pulls on the bones to which they are attached, in other word, Tendons which are fibrous connective tissue, muscle are attached to bones by tendons. The muscles contract to allow movement, while the skeletal gives the muscles support. The muscles and bones move together, basically with the muscles contracting the bones. The bone can not move back to its original state until another muscle pulls on it. Muscles work together to produce movement by…

INTRODUCTION: An individual’s level of strength is not only dependent upon on the muscles involved in an action but also the nervous systems ability to activate the appropriate muscles at any one time. It is well known that resistance training can lead to an increase in maximal contractile muscle force (Aagaard et al., 2002) however; this adaptation is not primarily explained by an increase in muscle volume or muscle cross-sectional area but adaptive changes within the nervous system.…

E - Beta myosin heavy chain is the protein that is most likely to cause the thickening of the ventricle described above. This is a major protein produced by the MYH7 gene and comprises the thick filament in cardiac muscle and plays a major role in cardiac muscle contraction. Mutations of this MYH7 cause excess thickening of the cardiac muscle, namely the left ventricle wall. It is not known how the mutation of MYH7 causes this thickening, but this thickening causes a functional impairment of…

Collagen Collagen functions as a structural component. Collagen is the most abundant protein in the human body and is the substance that holds the whole body together. It is found in the bones, muscles, skin and tendons, where it forms a scaffold to provide strength and structure. Lupus is a collagen vascular disease that causes unique symptoms in each patient. Additional symptoms can include shortness of breath, chest pain, headaches, and dry eyes. People with lupus may have long periods of…

regulation of calcium in smooth muscle is a result of phosphorylation of a myosin subunit by calcium calmodulin and myosin light chain kinase (MLCK). The cells are filled with dense bodies that serve as connection points between contractile units. Actin filaments project from one end of the dense bodies. Suspended in between the actin are the thick myosin filaments. When the smooth muscle is stimulated to contract, the myosin filaments will start inching toward the actin, resulting in the…

cisternae then releases calcium into the muscle fiber. Calcium will begin to bind to troponin. The troponin moves tropomyosin out of the way since it blocks the actin’s active site. Next, actin uses myosin-ATPase to break down ATP to ADP and phosphate so that the myosin heads can attach to the actin. The same myosin head will then form a bridge on the active site of the actin filament in order to That bridge pulls in actin and pushes it over…

: This table quantifies the number of amino acids that are different in the same position of the amino acid sequence of myosin heavy chain 6 alpha protein in zebra fish, cod, tilapia, salmon and flounder. The sequence alignment from the NCIB website is used to compare the genetic sequence of myosin and determine how closely related two species of fish are based on the number of amino acid sequence they have in common. The table indicates that flounder and tilapia have the least variation in the…

Muscle fibres. There are three types of muscle fibres; type 1, type 2a and type 2b. A. Type 1: These fibres are slow twitch or slow oxidative fibres and are red due to the presence of large volumes of myoglobin. They contract slowly but can contract repeatedly over long periods. These fibres would be suitable for an athlete such as a marathon runner because this is an endurance sporting event that requires you to use aerobic energy which relies on oxygen from the blood for the supply of energy.…

composed of contractile elements: sarcomeres. Muscle contraction is due to the slippage of myosin fibers on the actin fibers. For this, the head of the myosin binds to the troponin site of the actin filament. Then, an ATP molecule will bind to myosin to separate actin and myosin and thus allow its attachment to the neighboring troponin site due to hydrolysis of ATP in ADP + Pi. This creates a slippage of myosin fibers on the actin fibers and allows for muscle contraction. However, one molecule:…

Unfavorable has a negative connotation, it conjures up thoughts of ‘bad” and “non-useful” processes, however as we have learned through the case studies of muscle contraction and photosynthesis, this is simply a misconception. For in the natural world a favorable or unfavorable reaction is not a single entity but is rather part of a coupled reaction that uses the two in tandem to continue the function of essential processes. This being said, and connotation aside, an unfavorable reaction is one…