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sarcomere
The sliding filament theory is the explanation for how muscles produce force (or, usually, shorten). It explains that the thick and thin filaments within the sarcomere slide past one another, shortening the entire length of the sarcomere. In order to slide past one another, the myosin heads will interact with the actin filaments and, using ATP, bend to pull past the actin.
I-bands
During a contraction, the I bands and H zone of a sarcomere contract. The A bands remain unchanged.
Sarcomeres are composed of actin (thin filaments) and myosin (thick filaments).
the A-bandsthe A-bands
Sarcomere
Sarcomere
sarcomere
sarcomere
Sarcomere
The sarcomere itself will become shorter.The sarcomere will shorten.
One Z line to the next Z line
muscle fibre
sarcomere and sarcolemma are two different things. a sarcomere is between two d zisks of a myofiber (muscle fiber). a sarcolemma is a plasma membrane. there are many sections of sarcomere under the layer of sarcolemma.
The sliding filament theory is the explanation for how muscles produce force (or, usually, shorten). It explains that the thick and thin filaments within the sarcomere slide past one another, shortening the entire length of the sarcomere. In order to slide past one another, the myosin heads will interact with the actin filaments and, using ATP, bend to pull past the actin.
The noun for muscle shortening is called contraction.