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Why doesn't the A band change in length when a muscle contracts?
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When a muscle contracts how does its form change?
A muscle that contracts shortens whereas a muscle that relaxes lengthens.
What is it called when a Muscle contracts against a constant movable object?
an isometric contraction iso=same metric=length therefore the muscle maintains the same length as it contracts
Does muscle length change during isometric movements?
No, the length of the muscle fibers does not change. In isotonic movements is when the length changes.
What is a smooth muscle that contracts or relaxes to change the volume of the chest?
The Diaphragm.
What is a muscle cell?
A muscle cell is a cell which can change length
What does a muscle become when it contracts?
A muscle becomes shorter when it contracts.
Are striated under skeletal muscle?
Because muscle cells can only contract, not extend, skeletal muscles most work in pairs. While one muscle contracts, the other muscle in the pair relaxes to its original length.
Do muscle spindles measure the rate of stretch of a muscle?
They measure the rate of change of length of a muscle.
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.
A contraction in which there is no change in muscle length but there is a great increase in muscle tension is?
isometric contractions
What happens If a muscle is applied to a load that exceeds the muscle's maximum tension?
The muscle length will not change during a contraction.
When one muscle contracts what happens to the opposing muscle?
When one muscle in a pair contracts the other expands.
