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13 Cards in this Set
- Front
- Back
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Which period of the simple twitch has the longest elapsed time?
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Relaxation period
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Which period of the simple twitch has the shortest elapsed time?
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Latent period
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Do the three periods of the simple twitch last the same amount of time in all skeletal muscles of the human body? Why or why not?
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No, because every muscle has its own threshold level.
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Compare the elapsed times for the contraction period and the relaxation period.
Which is a slower process? |
Relaxation is the slower process.
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What is also known as the "loosening up phenomenon"?
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Treppe
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What aspect of skeletal muscle represents the elastic component?
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The connective tissue that surrounds elements of the muscle
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What effect does stretching the gastrocnemius muscle have on availability of actin and myosin binding sites?
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There are more interaction sites (binding sites).
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How does the length of a skeletal muscle compare to its points of attachment in the body?
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It's normally in a stretched position due to its attachment.
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How does this fact relate to the length-tension relationship?
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More work is done due to the starting stretched position.
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How does the length-tension relationship relate to the arrangement of anatomical
muscles in the body as antagonistic pairs? |
When you stretch one muscle, the opposite muscle will contract. There are opposite effects.
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Describe summation and what causes this phenomenon?
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Increased contractions caused by not letting the muscle relax
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What causes contracture?
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The body is being depleted of the elements it needs to contract, i.e. ATP and calcium. Also, lactic acid builds up.
Simply, it is called fatigue. |
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What does the term contracture refer to in terms of muscle contraction?
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Downward trend of work done by the muscle. It is more commonly called fatigue.
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