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Jesus Carranza Period 2 Muscular System - Coggle Diagram
Jesus Carranza Period 2 Muscular System
Action potential in a muscle fiber
4 steps of the cross-bridge cycle
Crossbridge formation: high-energy myosin heads attach to actin thin filament active site
Working “Power” stroke: myosin head pivots and posting filament towards M line
Crossbridge Detachment: ATP attaches to myosin head, causing crossbridge to detach
Cocking of myosin head: energy from hydrolysis of ATP cocks myosin head into a high-energy state which will then be used in a power stroke and next cycle
Major functions
Produce Movement
Stabilize joints
Maintain body posture and positiosn
Generate heat as they conduct
All skeletal muscles
Anterior
Posterior
Neuromuscular junction
Muscle coverings
Endomysium: fine areolar CT surrounding each muscle fiber
Epimysium: dense irregular CT surrounding entire muscle, may blend with facia
Perimysium: Fibrous CT surrounding fascicles (groups of muscle fibers)
3 types
Cardiac
Smooth
Skeletal
Disorders
Sliding filament theory of muscle contraction
Sarcomere