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Since muscles cannot do work by "expanding", they are arranged in pairs, pulling in opposite directions. When one muscle of a pair contracts, the other relaxes. This generates movement in the desired direction.
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∙ 11y ago
Wiki User
∙ 14y agoMuscles are composed of numerous individual muscle cells. They, in turn, are composed of myofibrils, and even smaller myofilaments. Each myofilament is either actin or myosin and they are contained in small contractile units called sarcomeres. When an action potential, electrical impulse, travels along the muscle cell, the sarcomeeres contract, making the muscle shorter. The name of the theory of this process is 'Sliding Filament Theory' and was first proposed by Hugh Huxley in 1969.
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∙ 11y agoWhen a muscle is contracted, it gets thicker, harder, and shorter.
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∙ 9y agoWhen muscles contract, they shorten. In the case of skeletal muscles, this moves bones.
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∙ 14y agoIt gets shorter and thicker
Wiki User
∙ 13y agonothing happens
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What happens when the biceps muscle contracts?
When the bicep contracts the triceps relax
When one muscle contracts what happens to the opposing muscle?
When one muscle in a pair contracts the other expands.
What happens when the muscle contracts?
Points The toes
What happens when an entire muscle contracts strongly and stays contracted?
when a muscle cramps
When the muscle contracts what happens to the tendon and bone?
shortends
If one muscle contracts what happens to the other one?
relax
What happens to the muscle fibers in your biceps when you bend your arm?
it contracts
What is an Isotonic Contractions?
Isotonic contractions. This happens when the muscle shortens as it contracts
When a muscle contrats what happens to its opposite muscle?
depends on which muscle but the opposite muscle sometimes contracts aswell to stabalize the joint some relaxes ...
What happens when a muscle contracts?
when the muscle shortens (contracts), the two bones come closer together, isometric contraction excepted.
What happens to the gastrocnemius muscle when the shank is flexed as in walking?
It contracts, getting shorter and thicker.
When you flex your arm muscle what happens?
The muscle in your arm contracts. The muscle on the other side of your arm, opposite from the side that you are flexing, stretches.
