Related questions
The skeletal muscle fiber arrangement that allows for more sarcomeres in series is better designed for _________________?
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velocity of movement |
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cross-bridging |
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cross-sectional area |
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force production |
Each of the muscle fibers are made up of even smaller fibers called as myofibrils. These myofibrils are formed of actin and myosin filaments. The actin filaments are thinner and myosin are thicker.The actin filaments are anchored to the Z lines.
The sarcomere is the basic force producing unit of muscle. It is formed of many actin and myosin filaments and the repeating units between two Z lines form a sarcomere. Myosin filaments overlap the actin filaments within a sarcomere. The attachment of myosin with the actin in muscle cell is called as cross bridge formation.
According to the sliding filament theory, there is sliding of the actin by the myosin filament. This results in the shortening of the sarcomere but the length of both the actin and myosin filaments remain the same. This theory explains the mechanism of muscle contraction. This is a widely accepted theory of muscle contraction.
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- Passive force in skeletal muscle fibers is generated by ______________________ the muscle.arrow_forwardStation Name/recognize the muscle Provide: 0: Origin I: Insertion A: Action Richt laceal superticial viewarrow_forwardFill in the blank: Muscle fiber contraction and nerve impulse conduction are similar in that both are _______________________responses.arrow_forward
- Station Name/recognize the muscle Provide: > 0: Origin I: Insertion 10 A: Action 11 Innervation 12 b) Poslerior viewarrow_forwardSelect the best answer or answers from the choices given: Characteristics of isometric contractions include all but (a) shortening, (b) increased muscle tension throughout the contraction phase, (c) absence of shortening, (d) used in resistance training.arrow_forwardFor the initial 10-12 seconds of muscle contraction, the ATP is provided by__________________.arrow_forward
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