During muscle contraction, some energy is supplied from creatine phosphate. Which of the following events occurs during the breakdown of creatine phosphate? Question 6 options: a ATP molecules breakdown producing ADP + P groups. b ATP molecules are formed when P groups are bonded to ADP. c ADP molecules break down producing AMP + P groups. d ADP molecules are formed when P groups are bonded to AMP

During muscle contraction, some energy is supplied from creatine phosphate. Which of the following events occurs during the breakdown of creatine phosphate? Question 6 options: a ATP molecules breakdown producing ADP + P groups. b ATP molecules are formed when P groups are bonded to ADP. c ADP molecules break down producing AMP + P groups. d ADP molecules are formed when P groups are bonded to AMP

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter7: The Peripheral Nervous System: Efferent Division

Section: Chapter Questions

Problem 1SQE

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If you were able to control fatigue in the muscle cell experimentally such that you only exposed the muscle to high levels of Pi and no other metabolites, what would you observe? A decline in force without much change in velocity A decline in velocity without much change in force A muscle operating below Lo A decline in both force and velocity An increased affinity of Ca2+ for troponin
Muscle contraction involves a protein conformational change called the power stroke. Where ultimately does the energy come from that allows a series of conformational changes involved in the power stroke? O Ca2+ O ATP hydrolysis O Actin polymerization O GTP hydrolysis
For the skeletal muscle, hydrolyzation of ATP: Group of answer choices At the myosin head gives rise to the generation of power stroke. At the actin G-molecule gives rise to the generation of power stroke. At the myosin head give rise to the rotation of myosin head to the "cocked back" position. At the actin G-molecule give rise to the rotation of myosin head to the "cocked back" position.
What happens to contraction of a muscle cell if some of the Ca2+ that was released during a contraction is still in the cytoplasm (sarcoplasm) when the next stimulus arrives? - The muscle contracts with the same tension generated as during the first contraction, because the number of cross-bridges formed is always the same during a contraction. - The muscle contracts with greater tension generated because more troponin molecules bound means greater myosin-binding sites (active sites) are revealed on the actin, leading to a larger number of cross-bridges formed. - The muscle contracts with greater tension generated because there will be more Ca2+ in the sarcoplasm after the second stimulation, which will bind to more troponin molecules. - The muscle contracts with the same tension generated as during the first contraction, because muscles contract in an all-or-none fashion.
96. An investigator is studying the contraction and relaxation of vascular smooth muscle in an experimental animal model. Which of the following describes the most likely order of events during this process? 0000000 200602 H) Myosin Light Chain Phosphorylation 1 2 2 3 3 4 4 Binding of Calcium to Calmodulin 3 1 4 2 4 2 3 Myosin Light Chain Dephosphorylation 2 3 4 3 4 2 1 2 Calcium Entry Into the Cell 4 2 3 1 1 1 3 1
The role of creatine phosphate in muscle cells is to: provide energy for muscles during extended physical activity (greater than 20 minutes) split glucose in two accept electrons "recharge" spent ATP in the first several seconds of a muscle contraction shuttle H atoms to the ETC
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
Why is adenosine triphosphate (ATP) used for muscle contraction?
Part 1 of 1- Question 1 of 1 During the actin-myosin ATP cycle, if there is no action potential on the muscle cell but lots of ATP available, which of the following statements will be true? • O A. Myosin will be attached to actin but there will be no ATP attached to the myosin head O B. ATP will have been split into ADP and Pi but a crossbridge will not have formed yet OC. The power stroke will have occurred, but no ATP can attach to the myosin head D. The crossbridge between the myosin head and actin will not break
An ion that is essential for muscle contraction is Ca2+. Which of the following statements about the calcium ion and muscle contractions is TRUE? Select one: a. Muscle contractions can occur whether Ca2+ concentrations are high or low. b. Ca2+ binds to the tropin-tropomyosin protein complex shifting it out of the way and allows the myosin to bind to the actin so contraction can occur. c. When Ca2+ concentrations are high, tropomyosin inhibits myosin binding and the muscle is relaxed. d. Ca2+ ions are stored in the sacroplasmic reticulum during the muscle contractions. i do not knwo which one is the answer
An ion that is essential for muscle contraction is Ca2+. Which of the following statements about the calcium ion and muscle contractions is TRUE? Select one: a. Muscle contractions can occur whether Ca2+ concentrations are high or low. b. Ca2+ binds to the tropin-tropomyosin protein complex shifting it out of the way and allows the myosin to bind to the actin so contraction can occur. c. When Ca2+ concentrations are high, tropomyosin inhibits myosin binding and the muscle is relaxed. d. Ca2+ ions are stored in the sacroplasmic reticulum during the muscle contractions. I do not know which one is
The sliding filament model depicts how myosin motors attached to actin lead to muscle contraction. This process proceeds in a precise series of events. Indicate which of the following shows the correct order of steps in the sliding filament model. Group of answer choices Myosin binds ATP; myosin tightly binds actin; power stroke; myosin releases actin Myosin binds GTP; myosin releases actin; power stroke; myosin tightly binds actin Actin binds ATP; power stroke; myosin tightly binds actin; actin releases ADP Actin binds ADP; myosin releases actin; power stroke; actin releases ADP

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a	ATP molecules breakdown producing ADP + P groups.
b	ATP molecules are formed when P groups are bonded to ADP.
c	ADP molecules break down producing AMP + P groups.
d	ADP molecules are formed when P groups are bonded to AMP