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40 Cards in this Set
- Front
- Back
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1. Identify the activity of rnyosin, actin, tropomyosin, and troponin.
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Myosin fibrils-Contraction and shortening of muscle.
Actin-Binding sites(attachment) for Myosin. Attached to z-line. Tropomyosin-covers receptors (On actin) until signaled. Troponin-aids in uncovering binding sites. |
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2. What are the 2 specialized membranes?
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Transverse Tubules (T-Tubules), Sarcoplasmic reticulum (SR)
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3. What is the function of each of these membranes?
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T-Tubules transport (AP) signal deep into cell.
Sarcoplasmic reticulum- store, release, and reuptake of Ca+ |
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4. Where does the ATPase reaction occur?
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Myosin fibrils
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5. What differentiates fast and slow contracting muscle?
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ATPase action different in Myosin. Difference in voltage action threshold,
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6. Understand the steps of muscle contraction (from the axon potential to reuptake of calcium).
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(See practice)
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7. What allows us to characterize the different isoforms of myosin?
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myofibrillar isoforms (myosin); allow us to categorize different myosin isoforms in myosin. Sample and stain allows us to see difference.
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8. Understand the characteristics differences between type I and type II muscle.
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Type 1- Slow twitch, slow oxidadative, Postural, slow to fatigue, lower Excitation level lower. (red)
Type II - Fast twitch, fatigue more quickly, glycolic or o2 glycolic, excitation level higher. (II-red, IIA-white) |
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9. Where is succinate dehydrogenase (relative to metabolism)?
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Krebs cycle
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10. What influence does endurance training have on the following?
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See following
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10a. Succinate dehydrogenase
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Range for maximal O2 uptake improves dramatically.
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10b. Oxidative capacity
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Improved
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10c. Type I fiber recruitment
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More efficient
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10d. Mitochondrial density
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improved
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11. What influence does resistance training have on the following?
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See following
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11a. Hypertrophy
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X-Section hypertrophy
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11b. Mitochondrial density
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decreased
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11c. Power generating capability
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Increased
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11d. Intracellular glycogen
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Increased?
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11e. Intracellular CP
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? Improved
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11f. ATP utilization rate
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Fast-improves
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11g. Rate of motor unit activation
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Increased
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11h. Motor unit synchronization
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increased
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11i. Coordination of antagonistic muscle groups
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increased
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12. Define the following as they related to factors involved in muscle adaptations to resistance exercise:
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See following
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12a. Specificity
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Stressing the training of muscles involved with a particular activity.
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12b. Reversibility
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Reverse effects happen when chronic training stops. (Atrophy)
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12c. Overload
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Must occur to improve strength and stimulate Hypertrophy
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12d. lndividuality
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Each individual may react differently to training effects.
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What 3 participants make up the "thin" filaments?
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Actin, Troponin, Tropomyosin.
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Identify the 6 participants in the sliding filament theory
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Myosin, Actin, Troponin, Tropomyosin, ATP, Calcium
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Which has a binding site for Calcium Ions?
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Actin (Troponin)
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Which is connected to the z-line?
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Actin
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Which encompases the thick filament?
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Myosin
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Which has a binding site for ATP?
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Myosin
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Which is respinsible for disconnecting the cross bridges?
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ATP
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Which covers the binding sites on Actin?
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TROPOMYOSIN
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What is stored in the terminal cisternae?
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Calcium
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What happens when ATP is depleted in the muscle?
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Rigor (Bridges won't relese)
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How does troponin move?
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Through the binding of calcium ions
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