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Yes the H band shortens. During contraction the length of the sarcomere or from z line to z line must decrease in length. Thus the I band which is bisected by the z line must shorten as well as the H band, even though the H band is bisected by the A band it must shorten to allow fior this decrease in length. The A band does not shorten because it is composed of the entire length of myosin whose length never decreases during contraction.
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoNo, the A band length remains unchanged, however when a muscle fibre contracts, the I-bands in each sarcomere decrease in width.
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How do banding patterns change when a muscle contracts?
When a muscle contracts, the actin and myosin myofilaments come together, the H zones and I zones shrink and become very narrow. The A band does not changing during contraction.
Describe which bands and zones of a sarcomere stay the same and which narrow or disappear during muscle contraction?
M line
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Crumple zones are areas of a vehicle designed to absorb energy during a collision and reduce personal injury.
Why have some cities set up free speech zones for political protestes?
They set up fee-speech zones in order to maintain order during protests.
Why have cities set free speech zones for political protest?
They set up fee-speech zones in order to maintain order during protests.
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during flood season in flood zones
Why have some cities set up free-speech zones for political protests?
They set up fee-speech zones in order to maintain order during protests.
During or after an attack who controls your movememnt between sectors and zones?
your unit control center
What climate zones experiences the greatest change in temp during the year?
temperate. 100%
During or after an attack who controls you movement between sectors and zones?
your unit comtrol center
During or after an attack who controls your movement between sectors and zones?
Your Unit Control Center
