Phosphocreatine + ADP creatine + ATP
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Calculate the actual, physiological ΔG for the reaction
at 37 °C, as it occurs in the cytosol of neurons, with phosphocreatine at 4.7 mM, creatine at 1.0 mM, ADP at 0.73 mM, and ATP at 2.6 mM.
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- Light less dense area of sarcomere that contains reminder of thin filaments but no thick filaments is calledIf you were to watch muscle tissue contract: Under a light microscope, would you see the muscle fibers get narrower, or the striations get thinner? Explain. At the EM level, focusing on one sarcomere, you would be able to see a region of thick filaments overlapping two regions of thin filaments. Use the structure of the thick filaments to explain how ONE region of thick filaments is able to pull in microfilament in two opposite directions (both toward the center of the sarcomere).Shortly after a person dies, Calcium ions diffuse out of the sarcoplasmic reticulum and the body becomes very stiff and rigid, a phenomenon called rigor mortis (stiffness + death). Given ATP’s role in myosin head movement, propose an explanation for rigor mortis.
- Describe the basic sequence of events that occurs at a neuromuscular junction.How many ATP molecules do we get from each creatine phosphate molecule?The filaments of skeletal muscle are moved by free energy derived from the hydrolysis of ATP. During sustained muscle contraction ATP levels remain fairly constant, while levels of creatine phosphate fall. Explain why this is so. Under what circumstances is an oxygen debt incurred during muscle contraction?
- This is an image of skeletal muscle tissue. Identify the structure labeled "A" (a) (b) myosin fascicle actin sarcomere B AExplain the role of ATP in muscle contraction and muscle relaxation.Which of the following shortens in length during skeletal mucle contraction? select all that apply Action filaments H- zone A- band I- band
- Describe how ATP and creatine phosphateinteract.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 AMPdescribe protein structure involved in muscle contraction