Examlex
The side to side thrashing of a nematode is accomplished by contraction of its circular muscles.
A Band
Length of the myosin myofilament in a sarcomere.
H Zone
Area in the center of the A band in which there are no actin myofilaments; contains only myosin.
I Band
A region within the sarcomere of skeletal and cardiac muscles identified by its light appearance under a microscope, consisting mainly of actin filaments.
Neuromuscular Junction
The synapse or junction where a motor neuron transmits a signal to a muscle fiber, causing it to contract.
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