Muscle Growth Essay

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.

Yоu get uр іn thе morning, half asleep, аnd stand іn front оf thе mirror, tо see іf уоur chest width has grown overnight. After ѕоmе time уоu аrе wide awake. Yоu take off уоur shirt аnd whаt уоu see іѕ аn astonishing six pack abs аnd wеll toned muscles bulging оut оf уоur biceps. But dоеѕn't іt sound like а dream!

ATP is required to break the attachment of actin to the myosin head. At death, calcium ions leak out of the SR

Smooth muscle contraction occurs when calcium is present in the smooth muscle cell and binds onto calmodulin to activate myosin light chain kinase (Wilson et al., 2002). Phosphorylation of myosin light chains result in myosin ATPase activity thus cross-bridge cycling occurs causing the muscle to contract (Horowitz et al., 1996). There are two known models of excitation and contraction in smooth muscle, electromechanical coupling (EMC) and pharmomechanical coupling

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.

For muscle to contract, actin and myosin filaments need to slide past each other, causing the sarcomere to shorten in length . Each myosin filament has a protruding bulbous head, which can bind with the binding sites on the

Martini, F. H., Nath, J. L., and Bartholomew, E. F. “Muscle Tissue.” Anatomy & Physiology. 9th

Elite sprinters can often have a makeup of up to 90% of fast twitch fibres, it helps them to be so fast. Incredibly long-distance competitors can have a make-up of up to 80% of type I (slow twitch fibres). It enables them to conserve energy and allows them to perform at such high intensity for long periods of time without getting tired quickly.

Because there is not enough ATP being produced to allow the muscle to contract that many times and for the length of time.

There are three types of myosin fibers within a muscle and those are aerobic fiber 1a (slow-twitch), aerobic fiber 2a (fast-twitch), and anaerobic fiber 2x (fast-twitch). 1a is low intensity and it increases in intensity to 2x. 1a and 2a are aerobic, so they require oxygen for cell respiration to complete glycolysis, Kreb’s cycle, and the electron transport train. If they do not get enough oxygen, they start to create lactic acid because they can only complete glycolysis. Whereas 2x fibers immediately start to create lactic acid because they are anaerobic and can not use oxygen so they only do glycolysis. Everyone is born with these three types of fibers usually almost equally balanced throughout their muscles but some people will get an unequal

Humans have two distinct types of muscle, type I and type II. Type I is considered slow, oxidative, and is used more commonly for endurance activities. Type II is considered fast, glycolytic and even oxidative, but it is used more for sprint-related activities. In addition, phosphorylase, lactic dehydrogenase (LDH), and succinate dehydrogenase (SDH) are skeletal muscle enzymes along with myosin ATP, NADII2, tetrazolium reducatse, and alpha-gycerophosphate dehydrogenase help determine the muscle types based on these measurements.

Chemistry has a major role in the hypertrophy of the bodies muscles from the release of chemicals, to the growth of the muscle tissue. Also, the loss of weight unnaturally. The topic will be about the growth of muscles, naturally and with supplements along with the loss of weight. The smaller areas will about the benefits of using substances like creatine and possible negatives of using supplements like human growth hormones commonly known as “HGH” and weight loss supplements. Also, what the best supplements to take if you’re interested in them.

During this week's class, we discussed over three types of muscle, which generally composed the major part of humans' body, seeking what type that my muscle belongs to. After all the activities, I found that my muscles have a fast twitch. Every time after I run in a short distance I could keep my pace in control. But when it's come to long-distance race, I realize that my suffering from ragged breathing, lacking of energy to support me from standing and sweating more than the other fellows. I would interpret my skeletal muscles as the combination of strength and explosive force. Thus, I want to develop more endurance to keep up with other sports. I hope I could try out swimming someday. Swimming contributes to long muscle fiber than other strength type sports. Also when muscles are at rest, slow twitch muscles are tend to be more soft and spread equally, but fast twitch muscles are more likely accumulated together. Therefore, I want to gain more slow twitched muscle to keep body in shape.

The strength of a muscle is proportional to the surface area of its cross section.

Abernathy (2013), “an individuals exercise capacity is determined by how much energy the muscle cell can produce and how quickly this energy can be made available to the contractile elements in skeletal muscle.”