Let me tell you about the main function of the muscular system, it really just covers movement honey. Muscles are the only tissue in the body that has the ability to contract and therefore move the other parts of the body.

Muscle Tissue

Big image

Contracts (and not the ratchet ones that lie about everything)

An action potential from a motor neuron triggers the release of Ca2+ ions from the sarcoplasmic reticulum
Calcium ions expose the myosin heads by binding to a blocking molecule (troponin complexed with tropomyosin) and causing it to move
The myosin heads form a cross-bridge with actin binding sites
ATP binds to the myosin heads and breaks the cross-bridge
The hydrolysis of ATP causes the myosin heads to change shape and swivel - this moves them towards the next actin binding site
The movement of the myosin heads cause the actin filaments to slide over the myosin filaments, shortening the length of the sarcomere
Via the repeated hydrolysis of ATP, the skeletal muscle will contract


Duchenne muscular dystrophy is an inherited disorder that involves muscle weakness, which quickly gets worse. Symptoms usually appear before age 6 and may appear as early as infancy.Muscle weakness: Begins in the legs and pelvis, but also occurs less severely in the arms, neck, and other areas of the body, Problems with motor skills (running, hopping, jumping), Frequent falls, Trouble getting up from a lying position or climbing stairs, Weakness quickly gets worse. Steroid drugs can slow the loss of muscle strength. They may be started when the child is diagnosed or when muscle strength begins to decline.

A weakness and rapid fatigue of muscles under voluntary control. Symptoms include weakness in the arm and leg muscles, double vision, and difficulties with speech and chewing. Now before you get all sad and stuff there are some treatments soo yasss! They include Edrophonium, Pyridostigmine by injection or by mouth (Mestinon), Neostigmine by injection, Prednisone (Deltasone), Physostigmine by injection. Which are all prescribed to you.