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What occurs when a muscle contracts spasmodically and involuntary?
The a voluntary muscle contracts involuntarily, you will see a little movement through your skin. These movements are often called Tics, Twitches, and Spasms. If the involuntary contractions are widespread and very energetic, they may be called, "Seizures".
What must a muscle cell do to keep contracting?
regenerate ATP at a very fast rate
Why are smooth muscles called smooth?
Smooth muscle is no way connected to the skeleton, example intestine liver etc. Where as striated muscle is connected to skeleton so it is called striated muscle. And the third type of muscle is Cardiac Muscle. --------------------------- Smooth muscle lack the sarcomeres that give skeletal and cardiac muscles their 'striated' appearance. Skeletal muscle isn't "called striated" because it it attached to the skeleton, it is called striated because sarcomeres give muscle a striated appearance. Thus the name, smooth muscle for looking smooth without striation.
What type of muscle is the skeletal muscle?
Sometimes they might be called striated muscle. Sometimes they might be called striated muscle.Any muscle that is attached to a bone is called skeletal muscle - they're the muscles which keep you upright & help you to move.
What is location of striated muscle in human body?
Striated muscle is so called because when viewed in a microscope bands of light, bark and medium darkness are seen. This occurs because of the very organized structures of the two protein filaments actin and myosin. Muscles with the filaments organized in a fashion that produces striation are the skeletal muscles and the cardiac muscle. Smooth muscle also have actin and myosin but they are not sin the same way so no striations are seen.
Can poliomyelitis damaged muscle cells be regenerated?
Polio affects the motor nerves that stimulate the muscles into action. The muscle can be massaged and this will help them increase in mass, but it does very little if nothing to help regenerate the motor nerves.
What are the three different types of muscle found in the human body?
Cardiac muscle tissue forms the bulk of the wall of the heart. Like skeletal muscle tissue, it is striated (the muscle fibers contain alternating light and dark bands (striations) that are perpendicular to the long axes of the fibers). Unlike skeletal muscle tissue, its contraction is usually not under conscious control (involuntary). Smooth muscle tissue is located in the walls of hollow internal structures such as blood vessels, the stomach, intestines, and urinary bladder. Smooth muscle fibers are usually involuntary (not under conscious control), and they are nonstriated (smooth). Smooth muscle tissue, like skeletal and cardiac muscle tissue, can undergo hypertrophy. In addition, certain smooth muscle fibers, such as those in the uterus, retain their capacity for division and can grow by hyperplasia. Skeletal muscle tissue is named for its location - attached to bones. It is striated; that is, the fibers (cells) contain alternating light and dark bands (striations) that are perpendicular to the long axes of the fibers. Skeletal muscle tissue can be made to contract or relax by conscious control (voluntary). All skeletal muscle fibres are not alike in structure or function. For example, skeletal muscle fibres vary in colour depending on their content of myoglobin (myoglobin stores oxygen until needed by the mitochondria). Skeletal muscle fibers contract with different velocities, depending on their ability to split Adenosine Triphosphate (ATP). Faster contracting fibers have greater ability to split ATP. In addition, skeletal muscle fibers vary with respect to the metabolic processes they use to generate ATP. They also differ in terms of the onset of fatigue. Based on various structural and functional characteristics, skeletal muscle fibres are classified into three types: Type I fibres, Type II B fibres and type II A fibers.
Are strained muscles voluntary or involuntary muscles?
A "strained"muscle is one that has been used more than normal, and is a voluntary muscle. Involuntary muscles are those that work without your having to think about it (heart for example) and are very difficult to "strain." Muscles that move when you choseto use them ( arms, legs) are more likely to suffer stress injuries.
Skeletal muscle and smooth muscle?
There are three types of muscle tissue: skeletal, smooth, and cardiac.Skeletal muscle tissue is a voluntary type of muscle tissue that is used in the contraction of skeletal parts. It is striated (alternating with light and dark bands, called striations) and is attached to bones. A single skeletal muscle fiber is very long and has many nuclei, located at the periphery of the cell. Individual muscle fibers are parallel to each other.Smooth muscle tissue is found in the walls of hollow internal organs and blood vessels. It is involuntary, nonstriated, and it's muscle fibers are small, thickest in the middle, and tapered at each end, containing single, centrally located nuclei. Smooth muscle tissue helps to narrow the lumen of blood vessels, physically break down and move food along the GIT as well as move fluids through the body and eliminate wastes.Cardiac muscle tissue is found only in the walls of the heart and it is striated but also involuntary. It's muscle fibers are branched, and usually have only one centrally located nucleus. cardiac muscle tissue has intercalated discs that transverse thickening of the plasma membrane attached to the muscle fibers from end-to-end. It contains cell junctions that strengthen cardiac muscle and holds the fibers together during its vigorous contractions and cell junctions known as gap junctions that also provide a quick route for conduction of electrical impulses.
What is the skeletal muscle?
There are three types of muscle tissue: skeletal, smooth, and cardiac.Skeletal muscle tissue is a voluntary type of muscle tissue that is used in the contraction of skeletal parts. It is striated (alternating with light and dark bands, called striations) and is attached to bones. A single skeletal muscle fiber is very long and has many nuclei, located at the periphery of the cell. Individual muscle fibers are parallel to each other.Smooth muscle tissue is found in the walls of hollow internal organs and blood vessels. It is involuntary, nonstriated, and it's muscle fibers are small, thickest in the middle, and tapered at each end, containing single, centrally located nuclei. Smooth muscle tissue helps to narrow the lumen of blood vessels, physically break down and move food along the GIT as well as move fluids through the body and eliminate wastes.Cardiac muscle tissue is found only in the walls of the heart and it is striated but also involuntary. It's muscle fibers are branched, and usually have only one centrally located nucleus. cardiac muscle tissue has intercalated discs that transverse thickening of the plasma membrane attached to the muscle fibers from end-to-end. It contains cell junctions that strengthen cardiac muscle and holds the fibers together during its vigorous contractions and cell junctions that also provide a quick route for conduction of electrical impulses.
What is the role of slow muscle fibers and fast muscle fibers in the response of a muscle to different types of exercise?
There are two broad types of voluntary muscle fibers: slow twitch and fast twitch. Slow twitch fibers contract for long periods of time but with little force while fast twitch fibers contract quickly and powerfully but fatigue very rapidly.
What is the difference between the contracted muscle and a relaxed muscle?
contracted muscle and relaxed muscle whats are the difference? contracted muscle means its very very contracted and relaxed muscle means its very very relaxed
