Ageing - Sarcopenia
8 Questions
4 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What are the degenerative pathways in muscle?

Increase mitochondrial ROS, increased inflammatory cytokines, muscle protein homeostasis changes (mTOR, AKt and FOXO pathways)

Cross sectional area of muscle after age 70 is reduced by what?

  • 40%
  • 30% (correct)
  • 20%
  • 50%
  • How much strength is reduced after age 70?

  • 40% (correct)
  • 50%
  • 20%
  • 30%
  • Selective loss of (insert here) fibres, and reinnervation to increase (insert here) fibres

    <p>Type II, and type I</p> Signup and view all the answers

    What does this result in?

    <p>Slow contractions, reduced force development, reduced limb acceleration</p> Signup and view all the answers

    How much fewer motor units are lower limb muscles supplied with after age 75?

    <p>30%</p> Signup and view all the answers

    How much fewer extensor digitorum brevis motor units after 60 years?

    <p>50%</p> Signup and view all the answers

    How much fewer motor units at vastus lateralis after age 65?

    <p>50-60%</p> Signup and view all the answers

    More Like This

    Muscle Regeneration Quiz
    2 questions
    Duchenne's Muscular Dystrophy Overview
    10 questions
    Duchenne Muscular Dystrophy Overview
    10 questions
    Use Quizgecko on...
    Browser
    Browser