H-Zone
It is a section of the Sarcomere that stretches from one end of the Myosin filament to the other, and also includes parts of the Actin filaments that overlaps it.
When sarcomeres shorten during muscle contraction, the I band and H zone both decrease in length. The I band, which contains only thin filaments, shortens as the thick filaments slide past them. The H zone, which is the area of the A band that contains only thick filaments, also diminishes as the thick filaments overlap more with the thin filaments. Overall, the A band remains the same length, while the I band and H zone decrease.
large surface area
To determine the area covered by a ton bag of pebbles with a 50mm thick layer, you need to calculate the volume of pebbles in the bag. Then, divide this volume by the thickness of the layer to get the area covered. Assuming the ton bag contains 1 cubic meter of pebbles, the area covered would be 20 square meters (1 cubic meter divided by 0.05 meters).
A Venn diagram has overlapping circles to help visualize the similarities and differences between two or more characters or subjects. Each circle represents a different character or subject, and the overlapping area shows what they have in common.
A-band. It has actin (thin protein) and myosin (thick protein) overlapping within it
The area of the sarcomere containing the thick filaments is known as the A band. It appears dark under a microscope due to the overlapping thick filaments. The A band also includes some thin filaments at its edges where they overlap with the thick filaments.
H zone
It is a section of the Sarcomere that stretches from one end of the Myosin filament to the other, and also includes parts of the Actin filaments that overlaps it.
It's the I Band.
During contraction, the H zone and I band shorten while the A band remains the same length. The A band is the dark band in the sarcomere that contains the thick filaments, the I band is the light band composed of thin filaments, and the H zone is the area in the center of the sarcomere where only thick filaments are present.
A sarcomere consists of thin and thick filaments arranged so they can slide over each other. The boundary of the sarcomere are the Z lines. Thin filaments extend from the Z lines and overlap with thick filaments in the middle of the sarcomere. The I band is on each side of the Z line where only thin filaments occur. The A band is the length of the thick filaments and is divided into three parts; the zone of overlap is on each end where thin and thick filaments occur, the H band is in the middle and has only thick filaments, and the M line is the center of the A band.
Stratum Spinosum The Stratum Spinosum is several cell layers thick. These cells contain a weblike system of intermediate filaments, mainly tension-resisting bundles of pre-keratin filaments, which span thir cytosol to attach to desmosomes.
H band
You think probable to the overlapping area.
large surface area
Gills are composed of thousands of filaments which are covered in lamellae (only a few cells thick and contain blood capillaries). This creates a large surface area and a short distance for gas exchange.