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5 Written questions

5 Matching questions

  1. The major role of the sarcoplasmic reticulum is to regulate ________.

    A) intracellular levels of Na+
    B) intracellular levels of Ca2+
    C) extracellular levels of Ca2+
    D) extracellular levels of Na+
  2. The force of muscle contraction is controlled by multiple motor unit summation or recruitment.
  3. What is the role of tropomyosin in skeletal muscles?

    A) Tropomyosin is the chemical that activates the myosin heads.
    B) Tropomyosin serves as a contraction inhibitor by blocking the actin binding sites on the myosin molecules.
    C) Tropomyosin is the receptor for the motor neuron neurotransmitter.
    D)Tropomyosin serves as a contraction inhibitor by blocking the myosin binding sites on the actin molecules.
  4. The muscle cell membrane is called the ________.
  5. Which of the following is not a connective tissue sheath that wraps individual muscle fibers?
    perimysium
    endomysium
    epimysium
    aponeurosis
  1. a D
  2. b sarcolemma
  3. c aponeurosis
  4. d true
  5. e B) intracellular levels of Ca2+

5 Multiple choice questions

  1. True
  2. False
  3. myofibrils
  4. sarcomere
  5. a state of sustained partial contraction

5 True/False questions

  1. What causes the release of calcium from the terminal cisternae of the sarcoplasmic reticulum within a muscle cell?

    A) calcium ion pump
    B) ATP
    C) troponin
    D) arrival of an action potential
    D) arrival of an action potential

          

  2. Which organelle contains the contractile elements found in skeletal muscle?sarcomere

          

  3. Which muscle cells have the greatest ability to regenerate?smooth

          

  4. ______ weight liftinga state of sustained partial contraction

          

  5. When calcium binds to ____, _____ releases tropomysoin, exposing the myosin binding sitesthick myofilaments