Skeletal Muscle Mechanics Model - Test 4
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| What are the 3 elements of the skeletal muscle mechanics model? | 1. Sarcomere 2. Tendons 3. Endomysium
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| True or False, When the parallel elastic element is shortening, the sarcomere is lengthening? | False, Both have to be lengthening or shortening together
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| What are the 4 phases of muscle contraction? | 1. Isometric Contraction 2. Isotonic contraction 3. Isotonic relaxation 4. Isometric Relaxation
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| During which phase of the muscle contration phase is there muscle tension development? | Isometric Contraction Phase
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| During which phase of the muscle contration phase is there muscle contraction? | Isotonic Contraction Phase
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| During which phase of the muscle contration phase is there muscle elongation? | Isotonic Relaxation Phase
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| During which phase of the muscle contration phase does muscle tension dissipate? | Isometric Relaxation Phase
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| What does isometric mean? | Same length
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| How does a muscle contract but the length does not change? | The contractile machinery contracts, but the series eleastic element stretches an equal amount
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| What does isotonic mean? | Same tension
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| What is the movement phases of muscle contraction? | Isotonic phases
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| What type of contraction actually lengthens muscle fibers? | Eccentric Contraction
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| The velocity of muscle contraction is dependent upon what factor? | The weight of the load
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| True or False, The greater the load, the faster the contraction. | False. Heavy load = Slow Contraction
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| What is the Series Elastic element? | Tendons
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| What is the Parallel Elastic element? | Endomysium
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| What is the Contractile element? | Sarcomere
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| During the Isometric Contraction Phase, what is happening to the Series Elastic element? Parallel Elastic element? Contractile element? | Series Elastic element - Lengthens, Parallel Elastic element - Shortens, Contractile element - Shortens
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| During the Isotonic Contraction Phase, what is happening to the Series Elastic element? Parallel Elastic element? Contractile element? | Series Elastic element - Stays the same length, Parallel Elastic element - Shortens, Contractile element - Shortens
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| During the Isotonic Relaxation Phase, what is happening to the Series Elastic element? Parallel Elastic element? Contractile element? | Series Elastic element - Stays the same length, Parallel Elastic element - Lengthens, Contractile element - Lengthens
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| During the Isometric Relaxation Phase, what is happening to the Series Elastic element? Parallel Elastic element? Contractile element? | Series Elastic element - Shortens, Parallel Elastic element - Lengthens, Contractile element - Lengthens
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| What phase of muscle contraction is happening when the sarcomeres are contracted and the whole muscle shortens? | Isotonic Contraction
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| What is another name for the sarcomere length - tension relationship? | Active Tension Curve
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| In the active tension curve, skeletal muscle diplays a bell shaped curve - Does cardiac muscle react in the same manner? | No
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| When is any muscle capable of generating its greatest velocity? | When there is no load
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| If a muscle is fully contracted, how much tension can be produced? | None
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