Muscular Physiology Warm Up 3

10 Questions | Total Attempts: 83

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Muscular Physiology Warm Up 3

Welcome to the 21st Century electronic classroom for human anatomy and physiology. This warm-up exercise will concentrate it's focus on the informational boxes found through out the chapter "Physiology of the Muscular System". This warm up allows you an unlimited number of attempts aiding in the learning process. Each attempt will randomize 10 different questions and answers!GOOD LUCK!


Questions and Answers
  • 1. 
    The _____ band is the segment of a sarcomere that runs the entire length of the thick filaments.
    • A. 

      A

    • B. 

      M

    • C. 

      Z

    • D. 

      I

    • E. 

      H

  • 2. 
    Calcium ions are released from the SR into the sarcoplasm, where it binds to troponin molecules in the thin myofilaments. Which step of the muscle contraction and relaxation was just described?
    • A. 

      Excitation and Contraction Step 2

    • B. 

      Excitation and Contraction Step 4

    • C. 

      Excitation and Contraction Step 6

    • D. 

      Relaxation Step 1

    • E. 

      Relaxation Step 3

  • 3. 
    After the impulse is over, the SR begins actively pumping Calcium ions back into its sacs.
    • A. 

      Excitation and Contraction Step 2

    • B. 

      Excitation and Contraction Step 4

    • C. 

      Excitation and Contraction Step 6

    • D. 

      Relaxation Step 1

    • E. 

      Relaxation Step 3

  • 4. 
    Myosin cross bridges are prevented from binding to actin and thus can longer sustain the contraction.
    • A. 

      Excitation and Contraction Step 2

    • B. 

      Excitation and Contraction Step 4

    • C. 

      Excitation and Contraction Step 6

    • D. 

      Relaxation Step 1

    • E. 

      Relaxation Step 3

  • 5. 
    Tropomyosin molecules in the thin myofilaments shift, exposing actin's active sites.
    • A. 

      Excitation and Contraction Step 5

    • B. 

      Excitation and Contraction Step 4

    • C. 

      Excitation and Contraction Step 6

    • D. 

      Relaxation Step 1

    • E. 

      Relaxation Step 3

  • 6. 
    A nerve impulse reaches the end of a motor neuron, triggering the release of the neurotransmitter acetylcholine.
    • A. 

      Excitation and Contraction Step 5

    • B. 

      Excitation and Contraction Step 4

    • C. 

      Excitation and Contraction Step 6

    • D. 

      Relaxation Step 1

    • E. 

      Relaxation Step 3

    • F. 

      Excitation and Contraction Step 1

    • G. 

      Relaxation Step 2

    • H. 

      Excitation and Contraction Step 7

  • 7. 
    As the filaments slide past the thick myofilaments, the entire muscle fiber shortens.
    • A. 

      Excitation and Contraction Step 5

    • B. 

      Excitation and Contraction Step 4

    • C. 

      Excitation and Contraction Step 6

    • D. 

      Relaxation Step 1

    • E. 

      Relaxation Step 3

    • F. 

      Excitation and Contraction Step 1

    • G. 

      Relaxation Step 2

    • H. 

      Excitation and Contraction Step 7

  • 8. 
    As Calcium ions are stripped from troponin molecules in the thick myofilaments, tropomyosin returns to it's position, blocking actin's active sites.
    • A. 

      Excitation and Contraction Step 5

    • B. 

      Excitation and Contraction Step 4

    • C. 

      Excitation and Contraction Step 6

    • D. 

      Relaxation Step 1

    • E. 

      Relaxation Step 3

    • F. 

      Excitation and Contraction Step 1

    • G. 

      Relaxation Step 2

    • H. 

      Excitation and Contraction Step 7

  • 9. 
    As the filaments slide past the thick myofilaments, the entire muscle fiber shortens.
    • A. 

      Excitation and Contraction Step 5

    • B. 

      Excitation and Contraction Step 4

    • C. 

      Excitation and Contraction Step 6

    • D. 

      Relaxation Step 1

    • E. 

      Relaxation Step 3

    • F. 

      Excitation and Contraction Step 1

    • G. 

      Relaxation Step 2

    • H. 

      Excitation and Contraction Step 7

  • 10. 
    The term rigor mortis is a Latin phrase that means "stiffness of death."
    • A. 

      True

    • B. 

      False