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5 Written questions

5 Matching questions

  1. the smallest contractile unit of a muscle fiber.
  2. What energizes the power stroke?
  3. Three discrete types of muscle fibers are identified on the basis of their size, speed, and endurance. Which of the following athletic endeavors best represents the use of red fibers?
  4. What event directly triggers the release of neurotransmitter from the synaptic vesicle in the axon terminal

    A) diffusion of K+ into the axonal terminus
    B) diffusion of Na+ out of the axonal terminus
    C) diffusion of Ca2+ into the axonal terminus
    D) diffusion of Na+ into the axonal terminus
  5. Binding of calcium to calmodulin is a step in excitation-contraction coupling of ________ cells.

    A) skeletal muscle
    B) smooth muscle
    C) cardiac and visceral smooth muscle
    D) cardiac muscle
  1. a hydrolysis of ATP
  2. b B) smooth muscle
  3. c diffusion of Ca2+ into the axonal terminus
  4. d sarcomere
  5. e a long relaxing swim

5 Multiple choice questions

  1. smooth
  2. C
  3. aerobic pathway
  4. True
  5. true

5 True/False questions

  1. A muscle that is lengthening while it produces tension is performing a(an) ________ contraction.

    A) eccentric
    B) isometric
    C) concentric
    D) maximal
    myoglobin

          

  2. Skeletal muscle cells have glycosomesTrue

          

  3. The muscle cell membrane is called the ________.sarcolemma

          

  4. Skeletal muscle cells contain myoglobinaerobic pathway

          

  5. What is the role of tropomyosin in skeletal muscles?

    A) Tropomyosin serves as a contraction inhibitor by blocking the actin binding sites on the myosin molecules.
    B) Tropomyosin is the chemical that activates the myosin heads.
    C) Tropomyosin serves as a contraction inhibitor by blocking the myosin binding sites on the actin molecules.
    D)Tropomyosin is the receptor for the motor neuron neurotransmitter.
    D) skeletal muscle: voluntary control