Order the following steps of muscle contraction: Drag and drop options into correct order and submit. For keyboard navigation... SHOW MORE ✓ III ||| III ||| III = III = III calcium binds to troponin inducing conformational change in the troponin/tropomyosin complex myosin head unbinds from actin inorganic phosphate group unbinds from myosin myosin binding sites on actin are exposed and myosin head binds to actin ADP unbinds from myosin and new molecule of ATP binds action potential raises the voltage of the myoblast power stroke occurs = sarcoplasmic reticulum releases calcium causing large influx of calcium into sarcoplasm

Order the following steps of muscle contraction: Drag and drop options into correct order and submit. For keyboard navigation... SHOW MORE ✓ III ||| III ||| III = III = III calcium binds to troponin inducing conformational change in the troponin/tropomyosin complex myosin head unbinds from actin inorganic phosphate group unbinds from myosin myosin binding sites on actin are exposed and myosin head binds to actin ADP unbinds from myosin and new molecule of ATP binds action potential raises the voltage of the myoblast power stroke occurs = sarcoplasmic reticulum releases calcium causing large influx of calcium into sarcoplasm

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter38: The Musculoskeletal System

Section: Chapter Questions

Problem 2VCQ: Figure 38.37 Which of the following statements about muscle contraction is true? The power stroke...

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Figure 38.37 Which of the following statements about muscle contraction is true? The power stroke occurs when ATP is hydrolyzed to ADP and phosphate. The power stroke occurs when ADP and phosphate dissociate from the myosin head. The power stroke occurs when ADP and phosphate dissociate from the actin active site. The power stroke occurs when Ca2+ binds the calcium head.
Figure 13.22 To what structures in a skeletal muscle are the endoneurium, perineurium, and epineurium comparable? Figure 13.22 Close-Up of Nerve Trunk Zoom in on this slide of a nerve trunk to examine the endoneurium, perineurium, and epineurium in greater detail (tissue source: simian). LM Ă— 1600. (Micrograph provided by the Regents of University of Michigan Medical School Â© 2012)
Number the following statements in the proper sequence to describe the contraction mechanism in a skeletal muscle cell ( select number from 1 to 12) Action potential (AP) arrive at axon terminal at neuromuscular junction (NMJ) [ Choose ] The muscle cell relaxes and lengthens [ Choose ] SR releases calcium and it binds to troponin [ Choose ] Myosin heads bind to actin and contraction begins [ Choose ] Ion permeability of sarcolemma changes and sodium begins entering muscle cell causing depolarization Calcium flows into presynaptic terminal to initiate neurotransmitter release [ Choose ] AP travels across the entire sarcolemma [ Choose ] Ach is released and binds to receptors on the sarcolemma [ Choose ] Local depolarization (end plate potential) ignites AP in sarcolemma [ Choose ] Troponin moves tropomyosin out of the way of myosin binding sites on actin [ Choose ] AP travels along T tubules [ Choose ] Cross bridge cycling continues until ATP runs out and/or calcium is…
Give an account of the excitation-contraction coupling (Figure 3) in skeletal muscle fibers. Highlight the role of dihydropyridine receptors and ryanodine receptors and the fate of A detailed description of the cross bridge cycle is not calcium ions after contraction. necessary. -Axon teminal of (=) somatic motor neuron ACh Muscle fiber potential Pion ++ Action potential- Na Motor end plate- T-tubule Sarcoptasmic reticulum lellll Ca2+ DHP receptor Tropomyosin Troponin z disk Actin M line Myosin head Myosin thick filament
In normal skeletal muscle contraction, which of the following represents the correct sequence of events? 1. Action potential 2. Ca2+ release into cytoplasm 3. Interaction between actin and myosin filaments 4. Ca2+ is pumped back to cisterns 5. Depolarization of T tubules Answers A-F A 1-2-5-3-4 B C 1-4-5-3-2 1-5-2-3-4 D 5-1-2-3-4 E F 5-4-3-1-2 5-4-1-3-2 O
In a flowchart with drawing, describe the process of muscle contraction. Make sure to highlight the function of the troponin and tropomyosin complex.
Describe what is happening overall in the first sentence. Then describe, in detail, what is happening in each step below. Include details about what is happening at steps 5 - 7 in terms of calcium and the contraction mechanism (from a different figure). (a) -Axon terminal of somatic motor neuron Muscle fiber ACh- potential Action Na+ Action potential- -Motor end plate- lell Ca2+ released Myosin thick filament 6 + + + ++
Which of the following conditions leads to production of lactate in the muscle? (Select all that apply) Group of answer choices ↑NADH ↑ATP ↑O2 ↑AMP
7. Label the structures in the diagram to the right. Describe the function of each structure in muscle contraction. Number Name Function 1 3 3 4 LEGO 6. 8. 9. 10 7 8. Image modifed by Saiwart rom ariginal by OpenStax https//ene.org/eonterta/FPIKieng8.25:(E13CSO10/Prefac, CCBY 4A https//commonswikimedia.orgindex.phpPcrid-30015033 9. 10 3,
Arrange the following in statements in the order that they occur during muscle contraction: 1-10 ACh leaves the synaptic knob and enters the synaptic cleft The action potential is carried deep into the muscle cell by T tubules The muscle cell relaxes and lengthens Myosin binds to and pulls on actin, resulting in muscle shortening Calcium attaches to troponin As calcium re-enters the sarcoplasmic reticulum, its concentration at the myofilaments decreases Calcium is released from the sarcoplasmic reticulum Tropomyosin rolls out of the way, exposing actin ACh diffuses across the synaptic cleft and attaches to protein receptors on the sarcolemma, resulting in muscle "excitation" Na+ enters the muscle cell and K+ exits, resulting in an action potential
Hill's equation gives a relation between muscle contraction rates νν and muscle tension TT (T+α)(ν+β)=(T0+α)β(T+α)(ν+β)=(T0+α)β for positive parameters αα and ββ and resting tension T0T0. Rewrite the equation so that the contraction rate is a function of tension.
correctly label the following parts of a skeletal muscle fiber