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Muscle Contraction Process
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Muscle Contraction Process

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Questions and Answers

What triggers the release of calcium ion from the nearby sarcoplasmic reticulum?

  • Change in potential of the membrane of the T tubule (correct)
  • End plate potential at the neuromuscular junction
  • Action potential in the motor neuron
  • Presence of Ca++ pumps

    • What is the role of acetylcholine in muscle contraction?

  • Causes action potential in the muscle cell
  • Triggers the release of calcium ion from the sarcoplasmic reticulum
  • Initiates the crossbridge cycle
  • Attaches to receptors in the motor end plate (correct)

    • Which component is responsible for initiating the crossbridge cycle in muscle contraction?

  • Tropomyosin
  • Calcium ion (correct)
  • Acetylcholine
  • Troponin

    • What is the function of the dihydropyridine receptor in muscle contraction?

    <p>Linked to proteins in the membrane of the T-tubule</p> Signup and view all the answers

    Which structure is known as a ryanodine receptor in muscle contraction?

    <p>Sarcoplasmic reticulum</p> Signup and view all the answers

    What is the effect of an action potential in the motor neuron on a muscle fiber?

    <p>Leads to an action potential in the muscle cell</p> Signup and view all the answers

    What does the presence of Ca++ pumps in the sarcoplasmic reticulum contribute to?

    <p>Maintains high calcium concentration in the sarcoplasmic reticulum</p> Signup and view all the answers

    What follows an end plate potential at the neuromuscular junction?

    <p>Action potential travels along the sarcolemma</p> Signup and view all the answers

    What is released at the neuromuscular junction following an action potential in the motor neuron?

    <p>Acetylcholine</p> Signup and view all the answers

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