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Muscular system - Coggle Diagram
Muscular system
Types of muscles
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Smooth muscle – located in various internal structures including the digestive tract, uterus and blood vessels such as arteries
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Types of contraction
Eccentric
Eccentric contraction occurs when the total length of the muscle increases as tension is produced. For example, the lowering phase of a biceps curl constitutes an eccentric contraction. Muscles are capable of generating greater forces under eccentric conditions than under either isometric or concentric contractions.
Isometric
Isometric contraction occurs when muscle length remains relatively constant as tension is produced. For example, during a biceps curl, holding the dumbbell in a constant/static position rather than actively raising or lowering it is an example of isometric contraction.
Concentric
In a concentric contraction, the muscle tension rises to meet the resistance then remains stable as the muscle shortens. During eccentric contraction, the muscle lengthens as the resistance becomes greater than the force the muscle is producing.
Muscle fibre types
Slow oxidative
Also known as red fibres and oxidative fibres . They possess a high number of mitochondria and their major source of energy is through aerobic metabolism
Fast oxidative
Fast oxidative fibres have fast contractions and primarily use aerobic respiration, but because they may switch to anaerobic respiration , can fatigue more quickly than SO fibres. Lastly, fast glycolytic fibres have fast contractions and primarily use anaerobic glycolysis.
Fast glycolytic
Fast glycolytic fibres fatigue quickly, permitting them to only be used for short periods
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