Week 5: Tuesday, Oct 3rd_MC
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Questions and Answers

Which of the following is true about the decline in muscle mass with aging?

  • Muscle mass remains constant throughout life.
  • Muscle mass peaks at 65 years old.
  • Muscle mass increases after 30 years old.
  • Muscle mass declines by 3-8% per decade. (correct)

    • Which term refers to the clinical loss of skeletal muscle mass and strength?

  • Physical Frailty
  • Sarcopenia (correct)
  • Myosteatosis
  • Dynapenia

    • What are ADLs?

  • Advanced Daily Lifestyles
  • Activities of Daily Living (correct)
  • Age-Related Decline in Living
  • Aging-related Decline in Muscle Function

    • Which of the following is a consequence of age-related skeletal muscle weakness?

    <p>Poor balance (D)</p> Signup and view all the answers

    What are IADLs?

    <p>Instrumental Activities of Daily Living (C)</p> Signup and view all the answers

    What are the main factors contributing to age-related decline in muscle function?

    <p>Changes in muscle mechanics and neuromuscular function (D)</p> Signup and view all the answers

    Which of the following statements is true about the decline in muscle size with age?

    <p>Muscle size decreases at a constant rate of 1.5% per year after the age of 50. (B)</p> Signup and view all the answers

    Which of the following is a factor contributing to age-related neuromuscular decline?

    <p>Atrophy and death of type II muscle fibers. (B)</p> Signup and view all the answers

    What is a motor unit?

    <p>A group of muscle fibers innervated by a single motor neuron. (D)</p> Signup and view all the answers

    What happens to motor units with age?

    <p>Motor units decrease in number. (A)</p> Signup and view all the answers

    What is the estimated rate of motor neuron death per year from the ages of 30 to 70?

    <p>1% (D)</p> Signup and view all the answers

    What are some intrinsic factors contributing to the decline in muscle strength and function with age?

    <p>Impaired ability to store and release calcium. (A)</p> Signup and view all the answers

    Which of the following statements about age-related changes in muscle strength is most accurate?

    <p>Muscle strength decreases by approximately 10% per decade starting at 40-50 years old. (B)</p> Signup and view all the answers

    Which of the following is true regarding the decrease in isotonic strength with age?

    <p>The decrease in isotonic strength is dependent on the velocity of contraction. (C)</p> Signup and view all the answers

    What happens to maximum power with age?

    <p>Maximum power decreases with age. (C)</p> Signup and view all the answers

    What is true regarding the rate of force development and relaxation with age?

    <p>The rate of force development and relaxation decreases with age. (B)</p> Signup and view all the answers

    Which of the following statements about force steadiness during light-load tasks is most accurate?

    <p>Force steadiness decreases with age during light-load tasks. (A)</p> Signup and view all the answers

    What happens to fatigability with age?

    <p>Fatigability decreases with age. (D)</p> Signup and view all the answers

    What is true regarding fatigability for isometric tasks with age?

    <p>Fatigability for isometric tasks decreases with age. (B)</p> Signup and view all the answers

    Which of the following statements about age-related changes in muscle performance is most accurate?

    <p>Age-related changes in muscle performance are highly variable between individuals. (C)</p> Signup and view all the answers

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