Muscle Recruitment Process

The anatomy and physiology of the human body explains that muscles are attached to the skeleton. They work like hinges or levers to pull or move particular joints when a muscle contracts, pulling the joint in the direction it is designed to move. Parts of muscles move antagonistically, that is, when one contracts, its opposite member relaxes to allow movement. Muscles can become slack, making movement slower and more difficult.

This activity is the critical driving force of muscle contraction. The stream of action potentials along the muscle fiber surface is terminated as Acetylcholine at the neuromuscular junction is broken down by acetyl cholinesterase. The release of Calcium ions is ceased. The action of the myosin molecule heads is obstructed because of the change in the configuration of troponin and tropomyosin due to the absence of calcium ions. This will eventually cause the contraction to be ceased. Together with these physical processes, an external stretching force such as gravity pulls the muscle back to its normal length.

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Abstract: In this experiment the measurements of skeletal muscle fibers of the rabbit are in millimeters. The average length for the three muscle fibers after adding the solution A which contained only 0.25% ATP in distilled water was 20 mm. The average length for the three muscle fibers after adding the solution C which contained 0.5M KCl and 0.001M MgCl2 in distilled water was 1.77 mm and the average length for the three muscle fibers after adding the solution B which contained 0.25 % ATP and 0.5 M KCl with 0.001 M Mgcl2 in water was 1.77 mm.

Muscles in human body is like the motor which supports or assist the bones at the joints to move and work. When the muscle pulls it moves the bones at particular joints, which establish the joints to move about.

The power stroke is responsible for the contraction of the muscle and force generation. ATP binding to the myosin head detaches the myosin head from the actin filament and allows the cycle to repeat. The coordinated contraction and relaxation of many muscles in an antagonistic fashion is the basis for the kinematics of any movement.

ZMA is a combination of Zinc, Magnessium and Vitamin B6. It plays a role as a Testosterone Supporting agent and is involved in ablout 500 metabolic reactions in our body. Besides increasing Testosterone, ZMA also increases the performance level and strength.

Chapter 13 talks about the muscular system and the way that it is works together with the skeletal system and other systems in our body. It also explains the ways our muscles contract and move and what processes are going on in within our muscles when we work each one of them. The chapter also talks about disorders that can happen within our muscles and the way they affect our life. What I found most surprising in the chapter was reading the box that talked about botox ad wrinkles. It was shocking to read that the toxin used for botox is one of the most lethal substances and yet people are voluntarily putting it in their body. Another thing that surprised me to know was that the same substance had also been approved to treat migraine headaches.

Motor Unit Recruitment - the successful activation of the same and more motor units with larger strength and voluntary muscle contraction

Individual muscles are made up of individual muscle fibers and these fibers can be further organized into a motor unit grouped within each muscle. A motor unit is simply a bundle of grouped muscle fibers. When you want to move the brain instantaneously sends a signal or impulse through the spinal cord that reaches the motor unit. Muscle fibers are cells like the basic building block of the muscle. There are a few different types of muscle fibers, each are designed for a specific type of muscle activity. Some muscle fibers are good for endurance exercises, other work best for the short bursts. Each muscle fiber is a single cell. Each cell consists of a structure.

The human muscular system is made up of over 600 connecting muscles. All of the muscles work together in sync to make your body move in inumerable different ways.

means when the muscle has completed a concentric contraction and is returning to its original

The Muscular System allows us humans to make movement like playing a piano, shooting a basketball, and etc. The Muscular System helps you breathe AND helps make your heartbeat! The organs in the Muscular System are biceps, triceps, hamstrings, & etc.Your hamstrings work to help you bend your knees. But your biceps and triceps work to help you lift things instead of bending your knees.

Muscle redundancy is an issue of having more muscles than the mechanical degree of freedom of the joint. Due to the muscle redundancy, a specific task can be performed by infinitely many different relative contribution of individual muscles. Moreover, some muscles are bi-articular joint muscle, which means they span more than one joint (e.g. gastrocnemius muscle). All together muscle redundancy generates a very complicated dynamic system to solve. For such kind of system, the resultant joint moment cannot be distributed directly to each muscle to find the individual muscle forces.

Oxygen is required by the cells to carry out respiration, this provides the energy in the form of adenosine-triphosphate (ATP) which is a molecule required for muscular contraction. As exercise takes place, oxygen is used