Examlex
Which of the following is true of the attraction-similarity hypothesis?
Myofibril
Specific muscle cell organelle containing a linear arrangement of sarcomeres, which shorten to produce muscle contraction.
Sarcomeres
The basic contractile unit of muscle fiber, consisting of actin and myosin filaments between two Z-lines.
Myofilaments
Protein filaments consisting of actin and myosin that are the primary components of muscle contraction.
Acetylcholine
A neurotransmitter in both the central and peripheral nervous systems that plays key roles in arousal, attention, memory, and muscle activation.
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