definition of muscle fiber
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- 1. muscle fiber-an elongated contractile cell that forms the muscles of the body. muscle cell, muscle fibre. fibre, fiber-any of several elongated, threadlike cells (especially a muscle fiber or a nerve fiber).
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- LINK / CITE ADD TO WORD LIST. noun. The definition of a fiber is a thin, threadlike structure that combines to form animal or plant tissue, or a thin, threadlike structure made synthetically or from minerals. 1  An example of fiber is what is found in asparagus.2  An example of fiber is a thread in a ball of rayon yarn.INK / CITE ADD TO WORD LIST. noun. The definition of a fiber is a thin, threadlike structure that combines to form animal or plant tissue, or a thin, threadlike structure made synthetically or from minerals. 1  An example of fiber is what is found in asparagus. 2  An example of fiber is a thread in a ball of rayon yarn.
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- A sarcomere is the most basic functional unit of a muscle fiber, which makes up striated muscle.
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muscle muscle. the contractile tissue that effects the movement of and within the body. Muscle tissue in the higher animals is classified as striated, smooth, or cardiac, according to its structure and function. Striated, or skeletal, muscle forms the bulk of the body's muscle tissue and gives the body its general shape.ll types of muscles consist of muscle fibers. Striated muscle fibers in skeletal muscles form bundles joined together by layers of connective tissue. The ends of muscle fibers are intertwined with tendon fibers, and through this combination muscular tension is transmitted to the skeletal bones.
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Fiber Fiber or fibre (from the Latin fibra) is a natural or synthetic string used as a component of composite materials, or, when matted into sheets, used to make products such as paper, papyrus, or felt. Fibers are often used in the manufacture of other materials.atural fibers include those produced by plants, animals, and geological processes and can be classified according to their origin: 1  Vegetable fibers are generally based on arrangements of cellulose, often with lignin: examples include cotton, hemp, jute, flax, ramie, sisal, bagasse, and banana.
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Muscle and Muscle Fibers Smooth muscle tissue is located in the walls of hollow structures such as blood vessels, the stomach, intestines, and the bladder. Smooth muscle fibers are usually involuntary, and they are non-striated (smooth). Smooth muscle tissue, like skeletal and cardiac muscle tissue, can undergo hypertrophy (growth).bjective: The objective of the muscle fiber test is to determine the fiber composition of the muscles being used for a particular exercise. Two test protocols are described: The Dr F. Hatield muscle fiber test and the Charles Poliquin muscle fiber test.
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muscle a bundle of long slender cells (muscle fibers) that have the power to contract and hence to produce movement. Muscles are responsible for locomotion and play an important part in performing vital body functions.They also protect the contents of the abdomen against injury and help support the body.oluntary muscles are those controlled by the conscious part of the brain, and are striated. These are the skeletal muscles that enable the body to move, and there are more than 600 of them in the human body. Their fibers are grouped together in sheaths of muscle cells.
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Muscle Skeletal muscle is made up of individual muscle cells or myocytes, known as muscle fibers. They are formed from the fusion of developmental myoblasts (a type of embryonic progenitor cell that gives rise to a muscle cell) in a process known as myogenesis. Muscle fibres are cylindrical, and multinucleated. Muscle fibers are in turn composed of myofibrils. The myofibrils are composed of actin and myosin filaments, repeated in units called sarcomeres, the basic functional units of the muscle fiber. The sarcomere is responsible for the striated appearance of skeletal muscle, and forms the basic machinery necessary for muscle contraction.
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Nerve fibers are also called? From Wikipedia, the free encyclopedia. A nerve fiber is a threadlike extension of a nerve cell and consists of an axon and myelin sheath (if present) in the nervous system. There are nerve fibers in the central nervous system and peripheral nervous system.
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Chapter 8: Muscular System A muscle fiber contraction is a complex interaction of cell components and biochemical. The final result is a movement within the myofibrils in which the filaments of actin and myosin slide past one another, shortening the muscle fiber and pulling on its attachments.
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Extrafusal muscle fiber Extrafusal muscle fibers are the skeletal standard muscle fibers that are innervated by alpha motor neurons and generate tension by contracting, thereby allowing for skeletal movement. They make up large mass of skeletal (striated) muscle and are attached to bone by fibrous tissue extensions (tendons). Each alpha motor neuron and the extrafusal muscle fibers innervated by it make up a motor unit. The connection between the alpha motor neuron and the extrafusal muscle fiber is a neuromuscular junction, where the neuron's signal, the action potential, is transduced to the muscle fiber by the neurotransmitter acetylcholine.
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muscle [mus´'l] a bundle of long slender cells (muscle fibers) that have the power to contract and hence to produce movement. Muscles are responsible for locomotion and play an important part in performing vital body functions. They also protect the contents of the abdomen against injury and help support the body. See appendix 3-4 and see color plates.
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What are Nerve Fibers? Nerve fibers are very thin, thread-like transmission lines that carry signals between nerves and receptors in the skin, muscles, and internal organs.
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fiber 8. any of the filaments or elongated cells or structures that are combined in a bundle of tissue: nerve fiber. 9. Also called bulk , roughage. the structural parts of plants that are wholly or partly indigestible, acting to increase intestinal bulk and peristalsis. Also, esp.
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Structure and Function of Skeletal Muscle The contraction of a muscle fiber is triggered by an action potential conducting over plasma membrane of the muscle fiber. The action potential conducts from the surface of the muscle fiber into the interior via transverse tubules (T tubules).These long tubes are continuous with the plasma membrane.ince muscle cells are elongated and cylindrical, each muscle cell is usually called a muscle fiber. In skeletal muscle, the muscle fibers are very large, multinucleated, and up to several millimeters in length.
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Structure of Skeletal Muscle Each skeletal muscle fiber is a single cylindrical muscle cell. An individual skeletal muscle may be made up of hundreds, or even thousands, of muscle fibers bundled together and wrapped in a connective tissue covering. Each muscle is surrounded by a connective tissue sheath called the epimysium.
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muscle fiber muscle fiber any of the cells of skeletal or cardiac muscle tissue. Skeletal muscle fibers are cylindrical multinucleate cells containing contracting myofibrils, across which run transverse striations.
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- Noun. 1. muscle fiber-an elongated contractile cell that forms the muscles of the body. muscle cell, muscle fibre. fibre, fiber-any of several elongated, threadlike cells (especially a muscle fiber or a nerve fiber). muscle, musculus-one of the contractile organs of the body.
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- Medical Definition of MUSCLE FIBER. : any of the elongated cells characteristic of muscle. What made you want to look up muscle fiber?
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- Within skeletal muscle there are three types of fiber: Type I. Type I fibers are also known as slow twitch fibers. They are red in colour due to the presence of large volumes of myoglobin and so oxygen and high numbers of Mitochondria.or this reason the muscles containing mainly type I fibers are often postural muscles such as those in the neck and spine due to their endurance capabilities Also, athletes such as marathon runners have a high number of this type of fiber, partly through genetics, partly through training. Type IIa.
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Muscle Fiber Type and What It Means for Strength Training Weight Training. Human skeletal muscle is made up predominantly of two types of muscle fiber: red fiber and white fiber. Red fibers (type 1) are also known as slow-twitch fibers, and white (type 2) are called fast-twitch fibers.
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Structure of Skeletal Muscle Skeletal muscles vary considerably in size, shape, and arrangement of fibers. They range from extremely tiny strands such as the stapedium muscle of the middle ear to large masses such as the muscles of the thigh. Each skeletal muscle fiber is a single cylindrical muscle cell. An individual skeletal muscle may be made up of hundreds, or even thousands, of muscle fibers bundled together and wrapped in a connective tissue covering. Each muscle is surrounded by a connective tissue sheath called the epimysium. Fascia, connective tissue outside the epimysium, surrounds and separates the muscles.
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muscle a bundle of long slender cells (muscle fibers) that have the power to contract and hence to produce movement. Muscles are responsible for locomotion and play an important part in performing vital body functions. They also protect the contents of the abdomen against injury and help support the body.etrusor muscle of bladder, detrusor urinae muscle the bundles of smooth muscle fibers forming the muscular coat of the urinary bladder, which are arranged in a longitudinal and a circular layer and, on contraction, serve to expel urine.
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Structure of Skeletal Muscle Each compartment contains a bundle of muscle fibers. Each bundle of muscle fiber is called a fasciculus and is surrounded by a layer of connective tissue called the perimysium. Within the fasciculus, each individual muscle cell, called a muscle fiber, is surrounded by connective tissue called the endomysium. Skeletal muscles have an abundant supply of blood vessels and nerves. Before a skeletal muscle fiber can contract, it has to receive an impulse from a neuron.
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Skeletal muscle Skeletal muscle is a form of striated muscle tissue which is under the voluntary control of the somatic nervous system. It is one of three major muscle types, the others being cardiac muscle and smooth muscle.Most skeletal muscles are attached to bones by bundles of collagen fibers known as tendons.Skeletal muscle is made up of individual muscle cells or myocytes, known as muscle fibers.uscle fibres are cylindrical, and multinucleated. Muscle fibers are in turn composed of myofibrils. The myofibrils are composed of actin and myosin filaments, repeated in units called sarcomeres, the basic functional units of the muscle fiber.
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Muscle Fiber Type and What It Means for Strength Training Fiber type propensity may also determine to some extent your ability to lift heavy weights with speed and power. Muscle exists as 3 types: cardiac muscle, smooth muscle, and skeletal muscle. Skeletal muscle is the target of strength and conditioning training. Smooth muscle makes up blood vessels and certain organs.