Describe all of the events in excitation-contraction coupling in the following paragraphs; before you can see other answers, you must write your own post; make sure you write your answer in your own words:

A.  Excitation, part 1: Explain what happens at the neuromuscular junction (NMJ). (see figure 10.10, 4 pts)

  • What is the role of the motor neuron?
  • What is the role of calcium in the motor neuron?
  • What membrane transport processes happen?
  • What is the role of the acetylcholine (ACh) receptor in the skeletal muscle cell?

B.  Excitation, part 2: What happens in a muscle cell after the events in the NMJ? (see figure 10.11, 4 pts)

  • What immediately happens as a result of ACh binding to the ACh receptor?
  • Revisiting the discussion board from chapter 12 – what is the electrical event that occurs – what was the term we used in chapter 12? Explain how it works.
  • Explain how the sarcolemma is similar to an axon. What happens along the surface of the sarcolemma?
  • What happens to the sarcoplasmic reticulum that allows it to release Ca++ into the cytosol?

C.  What happens at a sarcomere after Ca++ becomes available? Describe the steps of the contraction cycle and include the functions of all proteins in the thin and thick filaments. (see figure 10.13, 7 pts)

Write 3 separate paragraphs for parts A, B & C (one paragraph per question block).

Check your word count – you should be in the ballpark of 400 words. If you are significantly under that number, you probably need to add more details. Did you know that effective analysis of concepts requires professionalism in handling academic research Papers? Do no compromise on your grade choose professional Research writers at tenacity

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