option b muscles and fitness. movement in humans muscles: provide the force needed locomotion...
TRANSCRIPT
Option B
• Muscles and Fitness
Movement in Humans• Muscles: provide the force needed
locomotion• Tendons: attach muscle to bone• Bones: provide an anchor for muscles, act
as levers changing the size or direction of forces generated by muscles
• Ligaments: connect bone to bone, restricting movement at the joint
• Nerves: stimulate and coordinate muscle movement
Sliding Filament Theory of Muscle Contraction
• Relaxed vs. Contracted Sarcomere
• Synaptic Transmission
Physiology of Muscle Contraction
http://highered.mcgraw-hill.com
Animation: Action Potentials and Muscle Contraction
• (Knee) Joint: junction between bones• Cartilage – reduces friction;• Synovial Fluid – lubrication; • Joint Capsule – seals the joint, holds in the
synovial fluid• Ligaments
Joint Injuries• Sprains Grade I, II, III
• Grade I sprain: pain with minimal damage to the ligaments.
• Grade II sprain: massive ligament damage and mild looseness of the joint.
• Grade III sprain: the ligament is completely torn and the joint is very loose or unstable.
Torn Muscle
Joint Dislocation: bones moved out of alignment; often accompanied by
ligament damage
Intervertebral Disc Damage: bulging disc presses on nerves
causing radiating pain