Distance between two consecutive Z discs is one Sarcomere unit. I BAND is lighter in appearance because here only thing filaments (Actin) are present. The region of the dark band is having thick filaments ( myosin ) overlapped by thin filaments. The portion of the A band where thin filaments are absent is the H zone in the middle which is the M line.
Filaments are honestly massive arcs of plasma (electrified gas) inside the solar's surroundings. They appear darkish because they may be now not as warm as the solar floor in the back of them. Filaments are held in an area by powerful magnetic fields in the solar's atmosphere.
"Filaments are elongated clouds of solar material which can be tethered above the solar by using magnetic forces," NASA explains. The SDO captured this view in intense ultraviolet mild, which makes the filament seem like a dark jagged line amid the swirling cloth of the solar's surface.
The complete question is given below:
Identify the regions of the sarcomere. Note that labels may be used more than once.
Learn more about filaments here: brainly.com/question/13916606
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