muscular

• What is the function of a tendon?

  It connects muscle to bone
• How are muscles arranged in pairs?

  One muscle flexes while the other extends
• What are muscles made of?

  Bundles of muscle fibers
• What must happen for one muscle to contract?

  One muscle must be relaxed
• How do muscles contract?

  By the interaction of myosin and actin
• What are myofibrils?

  They are components of muscle fibers
• What are the characteristics of skeletal muscle?

  • Clear bands
  • Light-dark bands
  • Highly organized actin and myosin
  • Allow quick contraction and release
  • Attached through tendons
  • Each one controls a small aspect
  • Can be controlled voluntarily
  • Semantic neuroses system
• What is a key feature of cardiac muscle?

  It has complex branching
• What helps cardiac muscles to contract?

  Intercalated disks connect the cells
• What is the role of junctures in cardiac muscle?

  They help in rapid coordination of contractions
• What are the characteristics of smooth muscle tissue?

  • No striations
  • Fibers of myosin and actin
  • Not organized
  • Found around organs and blood vessels
  • Transport fluids
  • Apply force on organs
  • Move food or blood
• What type of joint is a hinged joint?

  A joint that allows motion in one plane
• What are synovial joints made up of?

  Two or more bones
• What covers the articular surfaces of joints?

  Hyaline cartilage
• What lubricates synovial joints?

  Synovial fluid
• What is the function of synovial fluid?

  • Lubricates joints
  • Reduces friction
  • Nourishes cartilage
• What is protraction in the context of limb movement?

  It is the fraction of the stride when the limb is moving forward and free from ground contact.
• What does protraction refer to in limb movement?

  • Protraction is the phase of movement.
  • It occurs when the limb is moving forward.
  • The limb is free from ground contact.
• What is the term used for the final part of the swing phase in limb movement?

  Retraction
• What occurs during the retraction phase of the swing phase?

  The limb moves backwards prior to initial ground contact
• What is the significance of retraction in the swing phase of limb movement?

  • It prepares the limb for ground contact
  • It helps in maintaining balance and momentum
  • It is crucial for effective locomotion