Muscles

• What is the sliding filament theory in muscle contraction?

  • Myofibrils shorten during contraction
  • A band remains the same length
  • I band shortens
  • Actin and myosin interact

  
• What neurotransmitter is involved at the neuromuscular junction?

  Acetylcholine.
• What is a motor unit?

  A motor unit consists of a motor neuron and the muscle fibers it innervates.
• What are the implications of a motor neuron releasing acetylcholine onto many muscle fibers?

  • Greater force generation
  • Less fine motor control
• What are the key components of muscle structure and function?

  • Skeletal muscle anatomy
  • Sliding filament theory
  • Regulation of contraction (troponin, tropomyosin, calcium)

  
• What does the term "motor unit" refer to?

  A motor neurone and the muscle fibres it innervates
• What neurotransmitter is released at the neuromuscular junction?

  Acetylcholine
• What happens when a motor neurone releases acetylcholine onto many muscle fibres?

  • Greater force of contraction
  • More muscle fibres activated
• What is the primary focus of the Muscle Twitch practical?

  To measure the twitch of muscles in the hand
• What are the key concepts to understand about muscle contraction?

  • Sliding filament theory
  • Role of actin and myosin
  • Regulation by troponin, tropomyosin, and calcium
• What is the essential content covered in the videos related to muscle tissue?

  Skeletal muscle structure and contraction

  
• What biochemical changes occur during muscle contraction?

  Changes in the interaction between actin and myosin
• How does the sliding filament theory explain muscle contraction?

  It describes the shortening of the sarcomere as actin filaments slide over myosin filaments
• What is the recommended reading for understanding skeletal muscle anatomy and physiology?

  Fundamentals of Anatomy and Physiology by Martini et al.
• What is the significance of the neuromuscular junction in muscle function?

  It is where motor neurones communicate with muscle fibres