sarcomere
Noun: * Sarcomere: The fundamental, repeating contractile unit of a myofibril in striated muscle tissue (such as skeletal and cardiac muscle). It is the smallest functional segment of a muscle fiber responsible for contraction.
The word "sarcomere" is a highly specific scientific term used primarily in the fields of biology, anatomy, physiology, and medicine. It refers to the microscopic structural unit.
Examples: * A single sarcomere extends from one Z-disc to the next. * Muscle contraction occurs when the sarcomeres within a myofibril shorten. * The precise arrangement of actin and myosin filaments gives the sarcomere its striated appearance under a microscope.
- Sarcomere length-tension relationship: A physiological principle stating that the force a muscle fiber can produce depends on the starting length of its sarcomeres.
- Example: The sarcomere length-tension relationship explains why a muscle generates maximum force at its optimal resting length.
- Sarcomeric (adjective): Of or relating to a sarcomere.
- Example: Titin is a giant sarcomeric protein that provides elasticity.
- Contractile unit
- Myofibril segment
Note: There are no common idioms or phrasal verbs associated with this precise scientific term.
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one of the segments into which a myofibril is divided
