Why is ATP required for skeletal muscle contraction? Choose all that apply.Release myosin and actin and reset the myosin headATP causes rigor mortisAttaching ATP to the myosin head initiates the power strokePump calcium ions back into the sarcoplasmic reticulum via active transportATP is not required for skeletal muscle contraction

release myosin and actin and reset the myosin head Attaching ATP to the myosin head initiates the…

Why is ATP required for skeletal muscle contraction? Choose all that apply. Release myosin and actin and reset the myosin head ATP causes rigor mortis O Attaching ATP to the myosin head initiates the power stroke Pump calcium ions back into the sarcoplasmic reticulum via active transport ATP is not required for skeletal muscle contraction

Why is ATP required for skeletal muscle contraction? Choose all that apply. Release myosin and actin and reset the myosin head ATP causes rigor mortis O Attaching ATP to the myosin head initiates the power stroke Pump calcium ions back into the sarcoplasmic reticulum via active transport ATP is not required for skeletal muscle contraction

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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Similar questions

Skeletal muscle is described as striated. What are the lighter, thinner stripes noted under the microscope? Group of answer choices troponin actin myosin dystrophin Rather than innervating individual muscle fibers, motor neurons often innervate two or more muscle fibers. The motor neuron and the muscle fibers it innervates are together called a: Group of answer choices motor unit myofibril muscle fascicle motor fascia Fast glycolytic muscle fibers allow for relatively quick ATP energy production by splitting glucose (but eventually leads to fatigue), a process described as: Group of answer choices fermentation aerobic pathway anaerobic pathway ATP reserve use
What do the calcium ions that are released into the cytoplasm during contraction bind to? tropomyosin actin the Z-line myosin O troponin
Muscles relaxatiom occurs when acetylcholine is cleaved from its receptors ,calcium is pulled back into the sarcoplasmic recticulum,the myosin is released from its binding site ,and the muscle fiber returns to its resting lenght true or false
Seconds Put the steps of excitation-contraction in order: 1 Myosin "heads" pivot, cause [ Choose ] Calcium is taken back up and the muscle relaxes Action potential triggers Ca2+ release from sarcoplasmic reticulum ACh produces large EPSP in muscle fiber 4 Muscle contracts Binding of Ca2+ to troponin causes myosin to bind to actin 5. EPSP evokes muscle action potential Alpha motor neurons release ACh Myosin "heads" pivot, cause filaments to walk along filament 7 [ Choose ) 8. [Choose ]
Why does continuouns calcium release within a muscle fiber cause greater tension? Acticates more calcium pump Activates myofibrils continuously Increase action potential frequency Lengthens sarcomere
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
What step DIRECTLY causes a sarcomere to shorten? cross- bridge formation calcium transport into SR calcium release power stroke myosin heads in high energy state
Which of the following statements are true? (choose all that apply) The Z-disc is found in the middle of an l-band Myosin are known as the thick filaments The A-band is seen as "dark" under the microscope Tropomyosin is on the Actin filament During a muscle contraction, the sarcomeres move farther apart A sarcomere is located from one H-zone to the following H-zone
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
Put in order the steps of activation, excitation and contraction of skeletal muscle.
Calcium initiates smooth muscle contraction by leading to the phosphorylation of calcium channels leading to the phosphorylation of myosin • activating myosin light chain phosphatase removing tropomyosin from actin
In a skeletal muscle if calcium levels in the cytosol increase, as calcium is released from the sarcoplasmic reticulum (SR,) how would this affect the position of the actin and myosin filaments? Group of answer choices Calcium released from the SR binds to calmodulin. Calmodulin activates myosin light chain kinase, causing cross bridge formation. Calcium released from the SR binds to troponin, moving tropomyosin and allowing for cross bridge formation. Calcium released from the SR binds to troponin, moving tropomyosin and inhibiting cross bridge formation. Calcium released from the SR binds to troponin, causing actin to detach from myosin. pick one answer