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Muscular System
The muscular system allows humans to move. Muscles also provide strength, balance and heat.
11,239 Questions
What are skeletal muscles composed of?
Skeletal muscle is well-organized body tissue, composed in a complex array of smaller and smaller structures. Each skeletal muscle is composed of many units called muscle fascicles. The fascicles are bound together by a type of connective tissue called fascia.
Fascicles are composed of smaller organizational units called muscle fibers.
Smaller strands called myofibrils organize muscle fibers. The myofibrils move as skeletal muscle contracts. It is the interaction of the myofibrils as they slide and pull along side each other that gives skeletal muscle its functional ability to do work and move things.
Putting it all back together, myofibrils compose muscle fibers, muscle fibers make-up muscle fascicles, and muscle fascicles are bound together by fascia to compose skeletal muscle.
Reviewed ByReview Date: 10/06/2008
Thomas N. Joseph, MD, Private Practice specializing in Orthopaedics, subspecialty Foot and Ankle, Camden Bone & Joint, Camden, SC. Review provided by VeriMed Healthcare Network.
Where are most flexor muscles located?
A flexor muscle is a muscle which bends or flexes a limb. Most flexor muscles are located on the anterior aspect of the body.
How do skeletal muscle fibers become multinucleated?
Being multinucleated enables anything to synthesize more protein. Also we know that skeletal muscle fibres are much longer than that of any other muscle fibre, so it needs a huge amount of actin and myosin protein to bring about required contraction of a muscle, as actin and myosin crossbridge is required for muscle contraction. Thus it can be postulated that this boon of being multinucleated is essential for a skeletal muscle to posses adequate amounts of actin and myosin for muscle contraction.
By-- faireena singh ( mbbs first year cmc)
What is the difference between an aponeurosis and a tendon?
They are basically the same thing......connecting muscles to bones but tendons are cord-like and aponeurosis is sheetlike.
Describe the difference between a tendon and an aponeurosis
What is the stationary end when a muscle contracts?
A muscle attaches to a bone at two points the origin and insertion. The origin is the immovable (stationary) point. The insertion is the movable point. The insertion always moves towards the origin.
Fibrous joint? The definition: consists of two bones that are united by fibrous tissue and exhibit little or no movement.
What special features does a muscle cell have?
it has sex with a neuirone cell to produce angela
muscle is responsible for movement in our body. they contain contractile protein. their are 3 types of muscles
1 striated muscle
2 unstriated muscle
3 cardiac muscle
u know what i m only 13 yrs old so i only know this much . hope u satisfy with my answer
What is the icd-9 code for Rotator Cuff?
ICD 9 codes are used for medical billing and coding. The ICD 9 code for status post rotator cuff surgery is 83.63.
What muscle moves the scapula forward and rotates scapula upward?
You can't have one muscle that both elevates AND depresses a bone. So your question is a little confusing,
Upward rotation: Serratus anterior, Upper and lower fibers of trapezius
Retraction (adduction): Middle fibers of trapezius, rhomboid major and minor
Elevation: Upper fibers of trapezius, levator scapulae, rhomboid major and minor
Depression: Lower fibers of trapezius
Let me know if I left any out but this should be all of them!
Trevor
.............................. the above answer is incomplete........
The trapezius is antagonist to itself, in that it can both elevate and depress the scapula
What eye muscle control the movement of the eye?
A total of six muscle move each eyeball, 4 rectus muscels and 2 obliques. The superior, inferior, lateral and medial rectal muscle all pull the eye to be looking more in ther own direction. The superior oblique pulls the eye to look down and laterally and the inferior oblique pull the eye to look um and medialy.
What is the connective tissue surrounding a fascicle?
The connective tissue surrounding the fascicle of a muscle is the perimysium.
What type of doctor specializes in the muscular system?
There is no one type of specialist who treats only muscles. The specialist would depend on the cause of the muscle problem. Rheumatologists, orthopedists, and neurologists may all treat conditions which affect the muscles.
What are the similarities between striated and smooth muscle?
One obvious similarity is that they are all muscles. This means that they all have actin and myosin which works together to contract a muscle. All types of muscles use this method to make something move.
In skeletal muscle, the contraction allows the bone to move, thereby allowing your body to move. In the heart, the cardiac muscle pumps the blood into the arteries. The smooth muscles in blood vessels are used to pump blood in one direction (in veins, which is in low pressure, there are valves which prevents backflow). The smooth muscles in digestive organs use the muscle to move the food through the digestive track, or the alimentary canal.
Describe the movement of the ribcage and diaphragm during exhalation?
I believe the ribs are there to protect our lungs, heart etc. When we breath in, what we are actually doing is telling our diaphragm to contract, which moves it in a downwards motion. This caused pressure in our lungs to lower which pulls in air.
Does skeletal muscle have gap junctions?
No. It's the only type of muscle tissue that doesn't have gap junctions. Cardiac and smooth muscles have gap junctions.
How are skeletal muscles stimulated to contract?
Skeletal muscles are stimulated by nerve impulses which relay, beginning with sensory neurons at the site of excitation and ending with the motor neuron appropriate to the muscle being used. For example, the palmaris longus, responsible for flexion in the wrist joint, is stimulated by the median nerve, or nervus medianus. There is certainly a lot more complexity to this and should therefore be answered in an equally more complex question.
What muscle appears striped under the microscope?
don't worry i got your back i took the assesment on connections academy and the answer is ......
B. Skeletal. i think tht i spelt it right
How many muscles does it take to throw a punch?
well if u throw right, the muscles it takes are the lower body, as in the legs and the hips. and just remember your arms just aim and hold the pitch
How can you help to prevent muscle mass loss as you age?
Regular exercise is probably the best way to maintain muscle tone, muscle mass and bone density. Even a walk around the neighborhood every evening could have a significant effect.
As the saying goes, "Use it or lose it."
