Muscular System Notes

Insertion

where the muscle is attached to a movable bone

Origin

where the muscle is attached to an immovable bone

Prime movers (agonists)

muscle responsible for a certain movement

Antagonist

muscles that oppose that certain movement

Synergists

muscles that aid in a certain movement through stabilization or adding an extra oomph

Myofibrils

organelle that makes up most of muscle cells

Sarcomere

contractile unit of a muscle

Epimysium

wraps around entire muscle

Perimysium

wraps around each fascicle

Endomysium

wraps around each muscle fiber

Muscle fibers

muscle cells

Sarcomere

What slides in the sliding filament?

Nervous system

Contractions only happen if stimulated by…

ADP and Calcium

What is need to relax the muscle?

What is needed for energy in a muscle?

ATP

ADP and Calcium

What is needed for a muscle to relax?