0
What else can I help you with?
Atrophy of skeletal tissue?
Atrophy of skeletal tissue refers to the loss of muscle mass and strength due to lack of use or decreased physical activity. It can also occur as a result of aging, injury, or certain medical conditions. Atrophy can be reversed through physical exercise and rehabilitation programs designed to increase muscle mass and improve functional capacity.
What is the medical term meaning excessive tone of the skeletal muscles?
The medical term for excessive tone of the skeletal muscles is hypertonia. This condition can be caused by various neurological disorders, such as cerebral palsy or multiple sclerosis, and can result in muscle stiffness and difficulty with movement and coordination. Treatment typically involves physical therapy and medications to manage symptoms.
How can smooth muscle contract if it has no striation or sarcomeres?
Actin and myosin are present in all three muscle types. In skeletal and cardiac muscle cells, these proteins are organized in sarcomeres, with thin and thick filaments. The internal organization of a smooth muscle cell is very different: • A smooth muscle fibre has no T tubules, and the sarcoplasmic reticulum (SR) forms a loose network throughout the sarcoplasm. Smooth muscle tissue has no myofibrils or sarcomeres. As a result, this tissue also has no striations and is called nonstriated muscle. • Thick filaments are scattered throughout the sarcoplasm of a smooth muscle cell. The myosin proteins are organized differently than in skeletal or cardiac muscle cells, and smooth muscle cells have more cross-bridges per thick filament. • The thin filaments in a smooth muscle cell are attached to dense bodies, structures distributed throughout the sarcoplasm in a network of intermediate filaments composed of the protein desmin. Some of the dense bodies are firmly attached to the sarcolemma. The dense bodies and intermediate filaments anchor the thin filaments such that, when sliding occurs between thin and thick filaments, the cell shortens. Dense bodies are not arranged in straight lines, so when a contraction occurs, the muscle cell twists like a corkscrew. • Adjacent smooth muscle cells are bound together at dense bodies, transmitting the contractile forces from cell to cell throughout the tissue. • Although smooth muscle cells are surrounded by connective tissue, the collagen fibres never unite to form tendons or aponeuroses as they do in skeletal muscles.
What are the components of the striations in striated and cardiac muscles?
Yes, they are. While skeletal muscles are arranged in regular, parallel bundles, cardiac muscle connects at branching, irregular angles. Anatomically, the muscle fibers are typically branched like a tree branch. In addition, cardiac muscle fibers connect to other cardiac muscle fibers through intercalcated discs and form the appearance of a syncytium (continuous cellular material). These intercalcated discs, which appear as irregularly-spaced dark bands between myocytes (muscle cells), are a unique feature of cardiac muscle .
What are some possible effects of muscle cramps?
Muscle cramps can cause pain, muscle stiffness, and limited range of motion. They may also lead to muscle weakness and fatigue, impacting physical performance and daily activities. In severe cases, muscle cramps can result in muscle damage or injury.
A skeletal muscle may undergo as a result of lack of physical exercise?
atrophy
What A skeletal muscle may undergo what as a result of lack of physical exercise or neurological or muscular disease?
Hypertension
Fratigue of skeletal muscle may result from?
Fatigue of skeletal muscle may result from a variety of factors, including depletion of energy stores such as ATP and glycogen, accumulation of metabolic byproducts like lactic acid, and disruption of calcium ion homeostasis. Additionally, neurotransmitter depletion at the neuromuscular junction can contribute to muscle fatigue. Prolonged or intense muscle activity can also lead to oxidative stress and damage to muscle fibers, further exacerbating fatigue.
Musculoskeletal deviations can result in?
Musculoskeletal deviations are abnormalities in the muscular and skeletal systems of an organism. These deviations can result in poor muscle balance and flexibility, and improper spinal alignment.
Why do skeletal muscles need a rich vascular supply?
Blood brings oxygen and ATP, which react with one another (oxidation), to the muscle cells. The result of this oxidation process (aerobic) is energy and heat. (Most of the body's heat originates from muscle activity.) Skeletal muscles will not contract unless stimulated by neurons.
Which tissue has more than one nucleus and is voluntary?
Skeletal muscle tissue has more than one nucleus and is under voluntary control. The multiple nuclei in skeletal muscle cells are a result of the fusion of multiple precursor cells during development. This tissue is under conscious control and allows for movement of the body.
What effects does aging have on muscle tissue?
As people age, their skeletal muscle mass starts to deteriorate. Your skeletal muscles (also known as lean muscle) are the muscles that attach to your bones and are under voluntary control.As a result of deterioration, people begin to look, well, flabby as they get older. You may see these changes start as early as your 30s, but most people see the biggest changes between their 40s and 50s.
What causes most injuries to the skeletal system?
Most injuries to the skeletal system result from trauma. For instance, fractures and sprains are usually the result of accidents.
Atrophy of skeletal tissue?
Atrophy of skeletal tissue refers to the loss of muscle mass and strength due to lack of use or decreased physical activity. It can also occur as a result of aging, injury, or certain medical conditions. Atrophy can be reversed through physical exercise and rehabilitation programs designed to increase muscle mass and improve functional capacity.
What painful muscle condition can result if you use a muscle too much and tear muscle fibers?
A muscle strain can result from overuse of a muscle and tearing of muscle fibers.
What is a muscle striation made of?
The striations seen in skeletal muscle fibers are the result of the alignment of hundreds of myofibrils within each muscle fiber. A myofibril is a cylindrical organelle as long as the muscle fiber. Myofibrils contain bundles of myofilaments, which are actin proteins and myosin proteins. The differences in the thicknesses of the myofilaments accounts for the banding pattern of light and dark striations.
What causes lymph to move toward the heart?
The lymph is circulated via muscle movement. The lymphatic system is not closed and has no central pump; thus transport is slow and sporadic. Lymph movement occurs due to peristalsis (propulsion of the lymph due to alternate contraction and relaxation of smooth muscle), valves, and compression during contraction of adjacent skeletal muscle and arterial pulsation.
