sarcomere

American  

[sahr-kuh-meer] / ˈsɑr kəˌmɪər /

noun

Biology.

1. any of the segments of myofibril in striated muscle fibers.

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sarcomere British  

/ ˈsɑːkəʊˌmɪə /

noun

1. any of the units that together comprise skeletal muscle

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sarcomere Scientific  

/ sär′kə-mîr′ /

1. The contractile unit of a skeletal muscle fiber. Sarcomeres are divided into bands of filaments made of actin or myosin. During muscle contraction, the filaments slide over each other to cause shortening of the sarcomere.

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Etymology

Origin of sarcomere

First recorded in 1890–95; sarco- + -mere

Example Sentences

See Examples For:

sarcomere

This suggests that these genetic variants may impact the sarcomere, the basic unit of heart muscle, influencing its structure and function.

From Science Daily ● Jan. 13, 2024

By expressing RBFox1 in immature human stem cell-derived heart cells, the researchers saw enhancements in key indicators of maturation, including cell size, sarcomere structure, contraction, calcium handling and oxygen usage.

From Science Daily ● Dec. 18, 2023

The scientists suspect, that this allows the thick filament to sense and process numerous muscle-regulating signals and thus to regulate the strength of muscle contraction depending on the sarcomere region.

From Science Daily ● Nov. 1, 2023

The combined activity of many binding sites and repeated movements within the sarcomere causes it to contract.

From Textbooks ● Apr. 25, 2013

For a muscle cell to contract, the sarcomere must shorten.

From Textbooks ● Apr. 25, 2013