How can we answer these questions ? E E ALT-Q Search5ParagraphStylesShirley was assigned to take Mr. Aletha to physical therapy. She helped Mr. Aletha into the wheelchair and tookhim down the hallway to the room where he was to receive strengthening exercises for his generalized muscleweakness. Mr. Aletha told Shirley that he often felt okay at the beginning of his therapy session but becameweaker as the session progressed. Mr. Aletha was in the hospital because of this perplexing problem. One dayShirley went to Mr. Aletha's room to take him to therapy, but Mr. Aletha told her that the sessions werecanceled: The therapy would not help his condition because he had myasthenia gravis. Shirley had heard aboutthis disease but did not understand the physiology. She went to her anatomy text and began to read thechapters on muscle contraction and nerve transmission. Help her answer the following questions so she can putthis puzzling disease in perspective.NormalYouSynaptic end bulb,AxonActionpotentialSynaptic-vesiclesMotor neuronVoltage-gatedCa channel89Synaptic cleftNo SpacingT-tubule-Heading 1Motor end plateMusclefibers-NeurotransmitterNeurotransmitterreceptorsWHeading 2PrtScTitlInsertFoc 4RF4. Muscle cells are full of the actin and myosin proteins.a. Briefly describe the arrangement of the actin and myosin molecules within the cell. How does the interactionbetween actin and myosin result in shortening of the muscle cell?b. Which molecule provides the energy to break the actin-myosin bond?c. Would the muscle be able to contract if they run out of energy? Explain why.d. What happens to muscles in the case of death? Why do the muscles stay in contracted state and relax onlyafter a certain period of time?5. Myasthenia gravis is an autoimmune disease in which the body's immune cells attack and destroy theacetylcholine (Ach) receptors in the motor end plates of muscles in the shoulder, neck, and face. When muscledo not contracts. Muscle atrophy (loss of muscle mass) is caused by not using the muscles enough. Why wouldMr. Aletha experience a progressive weakening even if he tries to do more exercise?6. Do aerobic (endurance) and resistance exercises produce the same effect on muscles? How do enduranceand anaerobic exercises normally enhance your ability to contract muscles?▬%5TQ SearchGF66YH&7UJe*8DEF10(9KO**F110**PF12PrtScInsert1/

It has been inquired about the role of actin and myosin proteins in muscle contraction, the vitality…

4. Muscle cells are full of the actin and myosin proteins. a. Briefly describe the arrangement of the actin and myosin molecules within the cell. How does the interaction between actin and myosin result in shortening of the muscle cell? b. Which molecule provides the energy to break the actin-myosin bond? c. Would the muscle be able to contract if they run out of energy? Explain why. d. What happens to muscles in the case of death? Why do the muscles stay in contracted state and relax only after a certain period of time?

4. Muscle cells are full of the actin and myosin proteins. a. Briefly describe the arrangement of the actin and myosin molecules within the cell. How does the interaction between actin and myosin result in shortening of the muscle cell? b. Which molecule provides the energy to break the actin-myosin bond? c. Would the muscle be able to contract if they run out of energy? Explain why. d. What happens to muscles in the case of death? Why do the muscles stay in contracted state and relax only after a certain period of time?

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

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter8: Muscle Physiology

Section: Chapter Questions

Problem 8RE

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