muscle fiber

a microscopic strand of muscle tissue that functions as a molecular machine converting chemical energy into force. Thousands of muscle fibers are linked by connective tissue into a muscle. Each fiber is, in turn, composed of millions of longitudinally aligned protein filaments. It is the interaction of actin and myosin protein molecules (sometimes together referred to as actomyosin) in these filaments that creates muscle contraction.

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Psychology term of the day

May 9th 2024

exo- (ex-)

Sorry, "exo-ex" is not in the Dictionary of Psychology. Please report to APA if you believe this is an error.