Examlex
How does the urethra differ between males and females?
Muscle Action
The process of muscles contracting and relaxing to produce movement in various parts of the body.
Tropomyosin
A regulatory protein that wraps around actin filaments in muscle cells, playing a key role in muscle contraction by controlling access to binding sites for myosin.
Sarcomere
The basic contractile unit of muscle fiber, consisting of myofilaments.
Myofilaments
Protein filaments consisting of actin and myosin that interact within muscle cells to cause contraction.
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