This website uses cookies to ensure you have the best experience. Learn more

The Important Role Of Skeletal Muscles In The Human Body

2245 words - 9 pages

Skeletal muscles play a huge role in the way our bodies function because without muscles, our bones would not properly be held together.
Most of the body’s muscle tissue is skeletal muscle. It interacts with the skeleton to move body parts. It’s long, thin cells are called fibers and they have more than one nucleus. Their structure gives them a striped look. The muscles are considered voluntary, which means that the contractions can be controlled.
A skeletal muscle contains bundles of muscle cells. Inside each cell are threadlike myofibrils, which are divided into sarcomeres, the unit of contraction. They are bundled together by connective tissue that extends past it to form tendons. A tendon is a strap of dense connective tissue that attaches a muscle to a bone. Tendons make joints more stable by keeping the adjoining bones appropriately aligned.
The human body has more than six hundred skeletal muscles. One end of the muscle is called the origin, which stays relatively motionless during contractions. The other end is called the insertion. It is attached to a bone that moves mostly while contractions occur. When a skeletal muscle contracts, it pulls on the bone it’s attached to. Because skeletal muscle exerts force only when it contracts, a second muscle, a flexor, is needed to flex or bend the joint.
Muscles attach very close to muscle joints, and are arranged in either pairs or groups. Some of the muscles work in reciprocal innervation, or opposition. That is, when one muscle stimulates, no signals are sent to the other group. Therefore, it does not contract. Other muscles work in a synergistic role. That is, it supports and the contraction adds force or helps stabilize another muscle.
The body has two basic types of skeletal muscle, “fast” and “slow.” Slow muscles, or red muscles, are slow, long-lasting contractions. The cells are packed with myoglobin, a reddish protein that binds oxygen for the cell’s use in making ATP. They are served by a large number of capillaries. The cells contract fairly slowly therefore, the slow cells are well equipped to make ATP. Fast or white muscles, are found in the hand and have fewer capillaries. There are fewer mitochondria and less myoglobin. Fast muscles can contract rapidly and powerfully for short periods. Muscle of the back and leg are called postural muscles, because they aid body support. Postural muscles must contract for long periods when a person is standing. They have a high proportion of red muscle cells.
A muscle contracts when its cell shortens. When a muscle cell shortens, many units of contraction inside that cell are shortening. Each of these basic units of contraction is a sarcomere. Bundles of cells in a skeletal muscle run parallel with the muscle. This is because the arrangement tries to focus the force of a contracting muscle onto a bone in the same direction. The nervous system controls muscle contractions. The motor neuron begins contraction of the sarcomeres....

Find Another Essay On The Important Role of Skeletal Muscles in the Human Body

The Role of Body Language in Communication

2012 words - 8 pages Introduction Non-verbal communication refers to “all external stimuli other than spoken or written words and including body motion, characteristics of appearance, characteristics of voice and use of space and distancing. All these non-verbal clues taken together are also known as body language. Body language plays significant role in oral communication. Sigmund Freud’s observation may appear to be an exaggeration but it is the exaggeration of a

The Important Role of Mathematicians in Society

1626 words - 7 pages The Important Role of Mathematicians in Society Thesis Statement This report will focus on the professional field of mathematicians. It will highlight some of the history, responsibilities, opportunities, and requirements of this occupation. Outline I.     Introduction A.     A condensed history of mathematics B.     Famous mathematicians and their accomplishments II

The Important Role of Music in Education

2490 words - 10 pages show up for classes regularly and as a result more students follow. All throughout the country, states are faced with many decisions about whether music should be taught in school. What's missing from our public schools is accountability from our teachers, principals, and leaders to recognize the benefit of music for students like little Jonny. We must find a way to ensure that music is taught and embraced as an important part of education

Carbs in The Human Body

539 words - 2 pages For my health project I did carbohydrates. They are the bodies energy source.Carbohydrates supply the body with the energy it needs to function. They are found almost exclusively in plant foods, such as fruits, vegetables, peas, and beans. Milk and milk products are the only foods derived from animals that contain a significant amount of carbohydrates.Carbohydrates are divided into two groups, simple carbohydrates and complex carbohydrates

Systems of the Human Body

1325 words - 5 pages have your skin you would die! When you sit perfectly still, there are muscles throughout your body that are constantly moving. The muscular system is a group of tough tissues that make up the body parts move and help in maintaining posture. The main organs are tendons, smooth muscles, skeletal muscles, and cardiac muscles. Tendons are tough tissues that connect muscle to bone. Smooth muscles are found in different places throughout the body

The Important of Human Resources

2109 words - 8 pages operations performance. Management decisions are to focus on achieving company's mission rather than only concerning on factors such as lowering costs.The speed of change and globalization are pressuring organizations, CEOs and HR leaders to respond faster to market forces. All leaders, including those in HR, will need to have a broad skill set. HR professionals who have the technical and human relations skills will be tested to perform additional roles

The Role of Immaturity in Human Development

581 words - 3 pages The prolonged juvenile period provides humans with the physical, social, and cognitive capabilities that are unmatched to any other species. The slow maturation process allows the human species to live longer and live smarter than any other mammal of comparable body size, and is the mechanism responsible for producing modern day humans. Immaturity has resulted in many benefits to the human species and can be directly linked as a

the role of reward in human motivation

1310 words - 5 pages The Role of extrinsic reward in human motivation Contents 1. Definition 2 2. The relationship between extrinsic rewards and motivation 3 3. Different factors that may influence the correlation between extrinsic reward and motivation 4 4. Different pay systems and their potential consequences 5-6 5. Conclusion 6 References 7 1. Definition Human behavior can be motivated by many different rewards, including pay, praise, promotion, alleviation of

The Important Role of Transcendentalism in American History

773 words - 3 pages The Important Role of Transcendentalism in American History In 1830, a movement known as Transcendentalism began to gain popularity in America. Representing an idealistic system of thought, "strength, courage, self-confidence, and independence of mind"1 were some basic values admired by the followers of the Transcendental movement. Transcendentalists opposed many aspects of their government, where they felt "many unjust laws

The role of religion in early America played an important

1858 words - 7 pages The role of religion in early America played an important factor in the way people treated their fellowman and the way society functioned as a whole. The manner in which a society operated reflected greatly upon the beliefs and practices of its culture. In early America, five diverse segments ? Native Americans, Planters, Puritans, Afro-Americans, and Rationalists/Revolutionaries illustrated such behavior.The Native Americans were the first

The Important Role of Books in a Child’s Life

2100 words - 8 pages the home environment. Many studies have shown that the home was the number one “predictor of a child’s language and literacy development” (Roberts 356) later on in life. This is not a big surprise since, the most important time for language acquisition for a child is in the second year of their lives (Lawhon 114). When a parent reads to a child, it introduces new vocabulary, which can be associated with picture or symbols on the page. When

Similar Essays

Human Body And The Skeletal System

2231 words - 9 pages releases its chemical directly into the bloodstream allowing our bodies to react rapidly. The human body has a highly organized endocrine system. The various glands must all work in harmony in order for one to function properly. Made of nearly ten glands, this is no small feat. All of the glands fall under the pituitary gland leadership. However, the pituitary needs help in directing the other glands so the hypothalamus receives

Muscles Are Th Engine Of The Body

1023 words - 5 pages Muscles are very important to the body. Muscles also do a lot for your body. They pump blood through your body, they help you lift heavy objects, and most of all they help your body in almost every way. Muscle is a body tissue that can contract and produce movement (Merriam-Webster Dictionary). Muscles are like the engine of the body; they turn energy into motion. Muscle tone isn’t as important as muscles, but it is very good for the body

Cellular Respiration In Skeletal Muscles Essay

1363 words - 6 pages a few contractions without rest. That last type of muscle fiber is fast intermediate which are the intermediate fibers. These types of muscle fiber is not too fast and are not too slow. Skeletal muscle is one of the largest organs of the body and is compartmentalized. Each muscle contains a single cell or fibers, which is embedded in a matrix of collagen. The tendon is composed of this matrix and connects the muscles to the bones. The skeletal

Verifying A Potential Role Of Gh In The Maintenance And Regeneration Of Skeletal Muscle Precursors

547 words - 2 pages demonstrated that apoptosis plays an important role in skeletal muscle development by controlling the size of this population of proliferating cells which undergo differentiation into mature myotubes (31, 53, 66). Recently, consistent evidences showed that apoptosis could be a mechanism responsible of accelerated satellite cells depletion in skeletal muscle with normal aging (16, 36). Age-associated increases in apoptosis have been observed in