StudentShare
Contact Us
Sign In / Sign Up for FREE
Search
Go to advanced search...

Skelatal Muscles - Essay Example

Cite this document
Summary
The mechanism of muscle contraction has been described through the sliding filament model, in which components, instead of decreasing in length, overlap among one another. Specifically, the thick, composed of myosin, and thin filaments, made up of actin, slide past each other…
Download full paper File format: .doc, available for editing
GRAB THE BEST PAPER96.4% of users find it useful
Skelatal Muscles
Read Text Preview

Extract of sample "Skelatal Muscles"

Download file to see previous pages

In turn, the abundance of Ca2+ ions allows binding with troponin, thus loosening up the tropomyosin that, during relaxation, twirls around the actin covering specifically the binding sites of myosin (http://www.unmc.edu/physiology/Mann/mann14.html. 2008). The next question is, where does ATP and Ca2+ needed for muscle contraction come from? It all starts from a motor neuron, which sends signals from the brain to muscles through neurotransmitters. The motor neurons release acetylcholine, which upon binding to cholinergic receptors on a myofibril, causing mobilization of ions and subsequent depolarization that results to the release of Ca2+ from the sarcoplasmic reticulum to the cytoplasm (http://www.unmc.edu/physiology/Mann/mann14.html. 2008).

Because of the many mechanisms discussed above, various conditions cause imbalance and subsequent abnormality to muscle contraction. Convulsion is a homeostatic imbalance state that causes the neurons to fire repeatedly and involuntarily. Thus, it causes, among others, the involuntary movement of skeletal muscles. On the other hand, in conditions such as stroke and multiple sclerosis, the neurotransmitters are not released from the neuromuscular junction, thus causing muscle weakness. In myotonia congenita, the chloride channel ions needed to put back the myofibrils into its hyperpolarized state after contraction are not expressed, leading to delayed relaxation.

Metubine is a compound that prevents and reduces the intensity of muscle contractions. Molecularly, it is a competitor of acetylcholine in binding to cholinergic receptors, which upon activation initiates muscle contraction (NCBI, 2010). Knowing its mechanism of action provides valuable information in addressing health conditions such as convulsion. Knowing the mechanisms of muscular contraction is important to nurses as it provides great insights on the type of drugs to be given in

...Download file to see next pages Read More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“Skelatal Muscles Essay Example | Topics and Well Written Essays - 750 words”, n.d.)
Skelatal Muscles Essay Example | Topics and Well Written Essays - 750 words. Retrieved from https://studentshare.org/health-sciences-medicine/1579235-skelatal-muscles
(Skelatal Muscles Essay Example | Topics and Well Written Essays - 750 Words)
Skelatal Muscles Essay Example | Topics and Well Written Essays - 750 Words. https://studentshare.org/health-sciences-medicine/1579235-skelatal-muscles.
“Skelatal Muscles Essay Example | Topics and Well Written Essays - 750 Words”, n.d. https://studentshare.org/health-sciences-medicine/1579235-skelatal-muscles.
  • Cited: 0 times

CHECK THESE SAMPLES OF Skelatal Muscles

Muscle Strain and Repair

The muscle fibers are the basic contractile units of skeletal muscles.... As well as being rich in connective tissue, skeletal muscles are highly vascularized to provide essential nutrients for muscle function.... muscles attached to bones or internal organs and blood vessels, are responsible for movement.... The integrated action of joints, bones, and skeletal muscles produces movements such as walking and running.... Skeletal muscles also produce the subtle movements that result in various facial expressions, eye movements, and respiration....
12 Pages (3000 words) Essay

Muscles & Skeletal System

The paper "muscles & Skeletal System" highlights that signaling involves the nerve impulses travelling between the brains.... Bones and muscles produce efficient coordination, which allows the body to function.... The nerves prompt the body's effectors (muscles that release a specific set of substance depending on the stimulus), to action.... It cannot move without the help of contractible muscles.... muscles connect to the bones through tendons and these connect with other bones through ligaments at the joint....
1 Pages (250 words) Essay

Types and Characteristics of Muscles

These muscles include the cardiac, smooth and skeletal muscles.... The skeletal muscles join bones and also facilitate the movement of the skeleton.... Smooth muscles (involuntary muscles) are… They are found in various organs including the stomach, respiratory system and circulatory system among other organs (Marieb & Hoehn, 2008).... On the other hand, the cardiac muscles control the autonomic nervous system....
1 Pages (250 words) Lab Report

The Importance of Human Anatomy in the Studying Body Movements

Body muscles are always responsible for all the movements in the body.... This ability is advocated to the presence of body muscles in their bodies.... In the absence of There are 206 bones in the human body which have roughly 700 muscles pulling on them.... Skeletal muscles can be said to be the only voluntary tissue in the human body.... Every movement that a human being initiates voluntarily cannot take place in the absence of the skeletal muscles....
6 Pages (1500 words) Essay

The Effects of Alcoholism on Skeletal and Cardiac Muscle

The author of this paper 'The Effects of Alcoholism on Skeletal and Cardiac Muscle' presents the letter to his brother and his addiction to alcoholism.... It concerns him as his brother with the current condition, and the author may not what he's going through which makes brother opt taking alcohol....
1 Pages (250 words) Essay

Muscles Involvement in Neurologic Disease

These are four main features of muscles.... Studies have identified plasticity of muscles as an important element… MS forms part of neuromuscular disease is a cluster of over twenty diseases whose effects impairs nerves, muscles and synapses between them.... Some of these conditions include neuropathy that is Notably, in MS disease, the muscles loses their elasticity, spasm and rigidity ensue (Nylander & Hafler, 2012)....
7 Pages (1750 words) Essay

Effect of Exercise on Skeletal Muscle

"Effect of Exercise on Skeletal Muscle" paper determines whether there are any alterations in the metabolic and mitogenic pathways in skeletal muscle physiology of normal persons and highly trained athletes.... The stimulus for this study was provided by past research.... hellip; Slow to fast and fast to slow transformations do occur in the human skeletal muscle and this is brought about by the regulation of the MHC isoform transformations....
13 Pages (3250 words) Coursework

Robotic Simulation of the Musculo-Skeletal System

This study will begin with the statement that although the muscles in the body are divided into three categories viz.... hellip; According to the study findings, it can, therefore, be said that the skeletal muscles are also called voluntary or striated muscles which possess peculiar anatomical and physiological characteristics to enable them to control locomotion in conjunction with the skeletal structures, under the influence of neural signals from the brain....
5 Pages (1250 words) Research Paper
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Contact Us