Muscle Recruitment and Muscle Tone Overview
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Questions and Answers

What is the first type of motor units recruited during muscle activation?

  • Random motor units
  • Largest motor units
  • Midsize motor units
  • Smallest motor units (correct)
  • Which type of muscle contraction involves increasing tension without a change in muscle length?

  • Isometric (correct)
  • Isotonic
  • Concentric
  • Eccentric
  • What is the role of muscle tone in the body?

  • To produce gross movements
  • To assist in muscle relaxation
  • To maintain stabilization, balance, and posture (correct)
  • To increase muscle size
  • During eccentric muscle contractions, the muscle is:

    <p>Lengthening (B)</p> Signup and view all the answers

    Which factor helps return a muscle to its resting length by performing opposite actions?

    <p>Opposing muscle contractions (A)</p> Signup and view all the answers

    What is the purpose of recruiting minimum motor units needed during muscle activation?

    <p>To avoid excessive tension in muscles (A)</p> Signup and view all the answers

    What is the term for the greatest tension produced at a muscle's 'optimal length'?

    <p>Peak tension (D)</p> Signup and view all the answers

    What factor affects the tension produced by a muscle?

    <p>Frequency of stimulation (C)</p> Signup and view all the answers

    Which type of contraction involves a 'staircase-like' increase in tension over the first 30-50 stimulations?

    <p>Treppe contraction (D)</p> Signup and view all the answers

    What does 'Tetanus' refer to in muscle contractions?

    <p>A type of contraction that produces maximum tension in a muscle (B)</p> Signup and view all the answers

    What is the term for the phenomenon where a second, immediate stimulation following relaxation leads to slightly higher maximum tension?

    <p>Treppe (B)</p> Signup and view all the answers

    How does sarcomere length affect active tension in muscles?

    <p>It determines the optimal overlap between actin and myosin filaments (A)</p> Signup and view all the answers

    What term is used to define ONE motor neuron and ALL of the muscle fibers that it controls?

    <p>Motor unit (D)</p> Signup and view all the answers

    Which type of tetanus involves continuous stimulation of a muscle fiber without allowing it to relax completely?

    <p>Complete tetanus (A)</p> Signup and view all the answers

    What does the size principle in motor unit recruitment state?

    <p>The smallest motor units are recruited first. (B)</p> Signup and view all the answers

    What mechanism is responsible for altering force production in muscles?

    <p>Motor unit recruitment (C)</p> Signup and view all the answers

    Which term describes the addition of one muscle twitch to another, resulting in a more powerful contraction?

    <p>Wave summation (A)</p> Signup and view all the answers

    How does summation tetanus differ from incomplete tetanus?

    <p>Incomplete tetanus involves continuous stimulation without relaxation. (C)</p> Signup and view all the answers

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