Practical Lab Techniques
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Questions and Answers

What is the purpose of reciprocal activation in muscle physiology?

  • To coordinate muscle movement and prevent muscle fatigue
  • To enhance muscle endurance and delay the onset of muscle soreness
  • To regulate muscle contraction and relaxation for efficient movement (correct)
  • To induce muscle hypertrophy and increase muscle strength

    • What happens when a muscle fiber is depleted of energy supplies?

  • The muscle will exhibit increased strength in contraction
  • The muscle will fail to relax between stimuli (correct)
  • The muscle will experience complete tetanus
  • The muscle will completely relax

    • What is the role of lactic acid in muscle physiology?

  • It directly triggers muscle contraction
  • It enhances ATP production in muscle cells
  • It competes with Mg2+ for binding to troponin (correct)
  • It causes rigor mortis in the absence of ATP

    • How does the stimulus frequency affect muscle contraction?

    <p>Higher stimulus frequency leads to incomplete muscle relaxation</p> Signup and view all the answers

    What is the primary function of ATP in muscle cells?

    <p>To provide energy for muscle contraction and relaxation</p> Signup and view all the answers

    What is the primary purpose of reciprocal activation in muscle physiology?

    <p>To coordinate muscle contraction and relaxation in antagonistic muscle pairs</p> Signup and view all the answers

    What is the role of lactic acid in muscle physiology?

    <p>Lowering the pH within the muscle cells, contributing to fatigue</p> Signup and view all the answers

    What is the effect of graded stimulus on muscle contraction?

    <p>It results in a stronger contraction as the stimulus strength increases</p> Signup and view all the answers

    What is the primary function of ATP in muscle cells?

    <p>To power the cross-bridge cycling during muscle contraction</p> Signup and view all the answers

    What happens when a muscle fiber is depleted of energy supplies?

    <p>The muscle fiber experiences a decrease in contractile force production</p> Signup and view all the answers

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