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Skeletal muscle tissue is made of many fibers, which have many sarcomeres with overlapping actin and myosin protein strands. When muscles contract their proteins overlap eachother and shorten the fiber, which then increases height but shortens in length of each fiber.
This process is called contraction. Muscles shorten or contract to produce movement.
Yes, muscles can only shorten and relax. They can only pull.
Nope. A joint is flexible if the muscles (with their attached tendons) are not spasmed, and if the ligaments are not too short. Stretching can frequently lead to increased flexibility (and mobility). This stretching tends to lengthen both the muscles and ligaments. On the other hand, if a joint is too hypermobile (unstable), exercise against resistance will tend to shorten these structures (first muscles, later ligaments), and can be very helpful...e.g., in the neck, which tends to be the most unstable part of the human spine. --Dr. Halle
An isometric contraction is the name given to a skeletal muscle that does not shorten, but increases tension. The muscles generate force to protect themselves.
Contractile proteins is the term that identifies the proteins that allow muscles to shorten or lengthen.
Contractile proteins is the term that identifies the proteins that allow muscles to shorten or lengthen.
yes. source: year 3 science class
lengthen
lengthen
disassemble
shorten or lengthen the note
Yes. The length of a shadow is determined by the altitude of the Sun. Therefore shadows shorten then lengthen as each day progresses and, between days, shorten and lengthen as summer comes and passes.
shorten
Muscles contract when sarcomeres shorten. The thin and thick filaments that compose sarcomeres do not shorten; instead, they slide past one another, causing the sarcomere to shorten while the filaments remain the same length.
Muscles can contract and shorten
An eccentric contraction is one that causes a muscle to lengthen.