Question 23Thin Filaments containA. ActinOB. TroponinOC. TropomyosinOD. All of the aboveOE. None of the above

Skeletal muscles are one of the three chief types of muscles found in the muscular system of the…

Answered: Thin Filaments contain A. Actin OB.…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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A bands: Dark areas that correspond to the areas where thick filaments are present. • I hands: Light areas that contains only thin filaments. . Z line: A protein disk within the I band that anchors the thin filaments and connects adjacent myofibrils. • H zone: Located in the middle of each A band, this lighter stripe appears corresponding to the region between the thin filaments. • M line: Protein fibers that connect neighboring thick filaments. Sarcomeres: The region of the myofibril between two Z lines. ** Keep in mind, this information is crucial for your understanding of the sliding filament theory.
Thick Filaments contain O A. Actin OB. Troponin O C. Tropomyosin O D. Myosin O E. All of the above
In the absence of O Ca2+; Tropomyosin and Tropomodulin the myosin binding sites in the actin microfilament are masked by O ATP: Tropomyosin and Troponin ATP: Cofilin and Profilin OCa2+; Tropomyosin and Troponin Previous
When animals die, the muscles stiffen in rigor mortis because…
During the cross bridge cycle, what is the first event that occurs after ATP binds myosin? the power stroke occurs myosin releases actin myosin binds actin to form another cross bridge myosin enters its energized state
// A mutation has occurred in a mouse's myosin II gene making it non-functional. Name all that are affected. Microvilli bundles Stress fibers O Filopodia Contractile rings
Within a sarcomere, which of the following is a structural protein is used to attach the Z-disk to the M-line? O Actin O Myosin ñed) O Titin Thin filament Dystrophin
Match the appropriate definition to the appropriate vocabulary word. The Herir A. Agonist ps generatem B. Aponeurosis ce che C. Extensibility D. Smooth muscle tive E. Cardiac muscle F. Motor-unit recruitment tains by G. Achilles Tendon er a sh t tim snive H. Synergist Sue I. Myofibrils e tis J. Fatigue en the t ier d f K. Type lla (fast oxidative glycolytic) A decreased ability for a muscle to sustain or generate force/tension. L. Muscles Muscle tissue that directly attaches to bone and is under voluntary control M. Type llx (fast glycolytic) N. Wave summation All the muscle fibers contracts together to generated the most amount of force/tension. O. Inguinal Ligament P. Elasticity A muscle fiber that fatigues the least, uses mostly oxidative phosphorylation, and generate the least amount of force. Q. Motor-unit A discrete group of specific type of muscle fibers innervated by a single R. Excitability motor neuron. A hierarchy of types of motor units recruited during contraction. S.…
After the power-stroke, the myosin heads must bind ______ in order to release actin. The muscles become very stiff (known as rigor mortis) after death because the cells run out of _____. " A calcium; calcium B troponin; troponin C tropomyosin; tropomyosin D sodium; sodium E ATP; ATP
S3
The functional unit of a muscle fiber is the, a segment from one Z disc to thenext.a. myofibrilb. I bandc. sarcomered. neuromuscular junctione. striation
Dark areas called _____ made of proteins are where actin filaments attach within a myofibril. A. Z lines B. A bands C.T tubules D. I bands

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Thin Filaments contain A. Actin OB. Troponin O C. Tropomyosin OD. All of the above O E. None of the above