Examlex
If the speed of light were infinite,how would black holes change?
Sarcomere
The basic contractile unit of muscle fiber, responsible for the muscle's ability to contract and produce movement.
A Band
The dark area extending across the length of the sarcomere in muscle fibers, composed of thick myosin filaments along with portions of thin actin filaments.
H Zone
A region within the sarcomere of striated muscle fibers visible under a microscope during muscle relaxation, containing only myosin filaments.
Deltoid
A large, triangular muscle covering the shoulder joint that provides the power for all arm lifting movements.
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