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Qu'est-ce (qui) est myofibril - définition

THE CONTRACTILE ELEMENT OF SKELETAL AND CARDIAC MUSCLE; A LONG, HIGHLY ORGANIZED BUNDLE OF ACTIN, MYOSIN, AND OTHER PROTEINS THAT CONTRACTS BY A SLIDING FILAMENT MECHANISM.

Sarcostyle; Myofibrils; Myofybril; Sarcostyles; Myofibrillar; Z - lines; Actinomyocin; Z lines; Muscle fibril; Muscle fibrils

myofibril

[?m???(?)'f??br?l]

¦ noun any of the elongated contractile threads found in striated muscle cells.

Myofibril

A myofibril (also known as a muscle fibril or sarcostyle) is a basic rod-like organelle of a muscle cell. Skeletal muscles are composed of long, tubular cells known as muscle fibers, and these cells contain many chains of myofibrils.

https://en.wikipedia.org/wiki/Myofibril

Muscle hypertrophy

ENLARGEMENT OR OVERGROWTH OF A MUSCLE ORGAN

Muscle growth; Muscular hypertrophy; Work hypertrophy; Myohypertrophy; Sarcoplasmic hypertrophy; Sarcoplasm hypertrophy; Myofibrillar hypertrophy; Myofibril hypertrophy; Myotrophic; Myotrophy; Muscle building; Muscle growing

Muscle hypertrophy or muscle building involves a hypertrophy or increase in size of skeletal muscle through a growth in size of its component cells. Two factors contribute to hypertrophy: sarcoplasmic hypertrophy, which focuses more on increased muscle glycogen storage; and myofibrillar hypertrophy, which focuses more on increased myofibril size.

https://en.wikipedia.org/wiki/Muscle_hypertrophy

Wikipédia

Myofibril

A myofibril (also known as a muscle fibril or sarcostyle) is a basic rod-like organelle of a muscle cell. Skeletal muscles are composed of long, tubular cells known as muscle fibers, and these cells contain many chains of myofibrils. Each myofibril has a diameter of 1–2 micrometres. They are created during embryonic development in a process known as myogenesis.

Myofibrils are composed of long proteins including actin, myosin, and titin, and other proteins that hold them together. These proteins are organized into thick, thin, and elastic myofilaments, which repeat along the length of the myofibril in sections or units of contraction called sarcomeres. Muscles contract by sliding the thick myosin, and thin actin myofilaments along each other.

https://en.wikipedia.org/wiki/Myofibril